POST Api not working?

[ghost]

How Shlink is set-up

• Shlink Version: 3.3.2
• PHP Version: 8.1.9
• How do you serve Shlink: Docker image (openswoole)
• Database engine used: The default, i guess MicrosoftSQL

Summary

Cant access the api with javascript (XMLHttpRequest). GET works but POST doesnt.

Javascript:

const url = 'https://example.com/rest/v3/short-urls';
let sendData = {"longUrl": "https://google.com/","tags": ["exampletag"]};
const request = new XMLHttpRequest();
request.open('POST', url);
request.setRequestHeader('accept', 'application/json');
request.setRequestHeader('X-Api-Key', 'redacted');
request.setRequestHeader('Content-type', 'application/json');
request.send(sendData);
request.onload = (e) => {
    alert(request.response)
}

Error:

{"title":"Internal Server Error","type":"https://shlink.io/api/error/internal-server-error","status":500,"detail":"An unknown error occurred."}

Docker Logs:

[2022-11-11T13:17:11.628541+00:00] [redactediguess] Shlink.ERROR - JsonException: Syntax error in /etc/shlink/vendor/shlinkio/shlink-common/functions/functions.php:20
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Stack trace:
#0 /etc/shlink/vendor/shlinkio/shlink-common/functions/functions.php(20): json_decode('[object Object]', true, 512, 4194304)
#1 /etc/shlink/module/Rest/src/Middleware/BodyParserMiddleware.php(45): Shlinkio\Shlink\Common\json_decode('[object Object]')
#2 /etc/shlink/module/Rest/src/Middleware/BodyParserMiddleware.php(35): Shlinkio\Shlink\Rest\Middleware\BodyParserMiddleware->parseFromJson(Object(Laminas\Diactoros\ServerRequest))
#3 /etc/shlink/vendor/mezzio/mezzio/src/Middleware/LazyLoadingMiddleware.php(27): Shlinkio\Shlink\Rest\Middleware\BodyParserMiddleware->process(Object(Laminas\Diactoros\ServerRequest), Object(Laminas\Stratigility\Next))
#4 /etc/shlink/vendor/laminas/laminas-stratigility/src/Next.php(49): Mezzio\Middleware\LazyLoadingMiddleware->process(Object(Laminas\Diactoros\ServerRequest), Object(Laminas\Stratigility\Next))
#5 /etc/shlink/vendor/mezzio/mezzio-router/src/Middleware/ImplicitOptionsMiddleware.php(72): Laminas\Stratigility\Next->handle(Object(Laminas\Diactoros\ServerRequest))
#6 /etc/shlink/vendor/mezzio/mezzio/src/Middleware/LazyLoadingMiddleware.php(27): Mezzio\Router\Middleware\ImplicitOptionsMiddleware->process(Object(Laminas\Diactoros\ServerRequest), Object(Laminas\Stratigility\Next))
#7 /etc/shlink/vendor/laminas/laminas-stratigility/src/Next.php(49): Mezzio\Middleware\LazyLoadingMiddleware->process(Object(Laminas\Diactoros\ServerRequest), Object(Laminas\Stratigility\Next))
#8 /etc/shlink/module/Rest/src/Middleware/ErrorHandler/BackwardsCompatibleProblemDetailsHandler.php(22): Laminas\Stratigility\Next->handle(Object(Laminas\Diactoros\ServerRequest))
#9 /etc/shlink/vendor/mezzio/mezzio/src/Middleware/LazyLoadingMiddleware.php(27): Shlinkio\Shlink\Rest\Middleware\ErrorHandler\BackwardsCompatibleProblemDetailsHandler->process(Object(Laminas\Diactoros\ServerRequest), Object(Laminas\Stratigility\Next))
#10 /etc/shlink/vendor/laminas/laminas-stratigility/src/Next.php(49): Mezzio\Middleware\LazyLoadingMiddleware->process(Object(Laminas\Diactoros\ServerRequest), Object(Laminas\Stratigility\Next))
#11 /etc/shlink/vendor/laminas/laminas-stratigility/src/MiddlewarePipe.php(75): Laminas\Stratigility\Next->handle(Object(Laminas\Diactoros\ServerRequest))
#12 /etc/shlink/vendor/laminas/laminas-stratigility/src/Middleware/PathMiddlewareDecorator.php(62): Laminas\Stratigility\MiddlewarePipe->process(Object(Laminas\Diactoros\ServerRequest), Object(Psr\Http\Server\RequestHandlerInterface@anonymous))
#13 /etc/shlink/vendor/laminas/laminas-stratigility/src/Next.php(49): Laminas\Stratigility\Middleware\PathMiddlewareDecorator->process(Object(Laminas\Diactoros\ServerRequest), Object(Laminas\Stratigility\Next))
#14 /etc/shlink/vendor/laminas/laminas-stratigility/src/Next.php(42): Laminas\Stratigility\Next->handle(Object(Laminas\Diactoros\ServerRequest))
#15 /etc/shlink/vendor/mezzio/mezzio-router/src/Middleware/ImplicitHeadMiddleware.php(76): Laminas\Stratigility\Next->handle(Object(Laminas\Diactoros\ServerRequest))
#16 /etc/shlink/vendor/mezzio/mezzio/src/Middleware/LazyLoadingMiddleware.php(27): Mezzio\Router\Middleware\ImplicitHeadMiddleware->process(Object(Laminas\Diactoros\ServerRequest), Object(Laminas\Stratigility\Next))
#17 /etc/shlink/vendor/laminas/laminas-stratigility/src/Next.php(49): Mezzio\Middleware\LazyLoadingMiddleware->process(Object(Laminas\Diactoros\ServerRequest), Object(Laminas\Stratigility\Next))
#18 /etc/shlink/vendor/mezzio/mezzio-router/src/Middleware/RouteMiddleware.php(50): Laminas\Stratigility\Next->handle(Object(Laminas\Diactoros\ServerRequest))
#19 /etc/shlink/vendor/mezzio/mezzio/src/Middleware/LazyLoadingMiddleware.php(27): Mezzio\Router\Middleware\RouteMiddleware->process(Object(Laminas\Diactoros\ServerRequest), Object(Laminas\Stratigility\Next))
#20 /etc/shlink/vendor/laminas/laminas-stratigility/src/Next.php(49): Mezzio\Middleware\LazyLoadingMiddleware->process(Object(Laminas\Diactoros\ServerRequest), Object(Laminas\Stratigility\Next))
#21 /etc/shlink/vendor/laminas/laminas-stratigility/src/MiddlewarePipe.php(75): Laminas\Stratigility\Next->handle(Object(Laminas\Diactoros\ServerRequest))
#22 /etc/shlink/vendor/laminas/laminas-stratigility/src/Next.php(49): Laminas\Stratigility\MiddlewarePipe->process(Object(Laminas\Diactoros\ServerRequest), Object(Laminas\Stratigility\Next))
#23 /etc/shlink/vendor/laminas/laminas-stratigility/src/Next.php(42): Laminas\Stratigility\Next->handle(Object(Laminas\Diactoros\ServerRequest))
#24 /etc/shlink/vendor/shlinkio/shlink-common/src/Middleware/CloseDbConnectionMiddleware.php(24): Laminas\Stratigility\Next->handle(Object(Laminas\Diactoros\ServerRequest))
#25 /etc/shlink/vendor/mezzio/mezzio/src/Middleware/LazyLoadingMiddleware.php(27): Shlinkio\Shlink\Common\Middleware\CloseDbConnectionMiddleware->process(Object(Laminas\Diactoros\ServerRequest), Object(Laminas\Stratigility\Next))
#26 /etc/shlink/vendor/laminas/laminas-stratigility/src/Next.php(49): Mezzio\Middleware\LazyLoadingMiddleware->process(Object(Laminas\Diactoros\ServerRequest), Object(Laminas\Stratigility\Next))
#27 /etc/shlink/vendor/laminas/laminas-stratigility/src/MiddlewarePipe.php(75): Laminas\Stratigility\Next->handle(Object(Laminas\Diactoros\ServerRequest))
#28 /etc/shlink/vendor/laminas/laminas-stratigility/src/Next.php(49): Laminas\Stratigility\MiddlewarePipe->process(Object(Laminas\Diactoros\ServerRequest), Object(Laminas\Stratigility\Next))
#29 /etc/shlink/vendor/laminas/laminas-stratigility/src/Middleware/PathMiddlewareDecorator.php(122): Laminas\Stratigility\Next->handle(Object(Laminas\Diactoros\ServerRequest))
#30 /etc/shlink/vendor/laminas/laminas-stratigility/src/Next.php(42): Psr\Http\Server\RequestHandlerInterface@anonymous->handle(Object(Laminas\Diactoros\ServerRequest))
#31 /etc/shlink/vendor/mezzio/mezzio-problem-details/src/ProblemDetailsMiddleware.php(47): Laminas\Stratigility\Next->handle(Object(Laminas\Diactoros\ServerRequest))
#32 /etc/shlink/vendor/mezzio/mezzio/src/Middleware/LazyLoadingMiddleware.php(27): Mezzio\ProblemDetails\ProblemDetailsMiddleware->process(Object(Laminas\Diactoros\ServerRequest), Object(Laminas\Stratigility\Next))
#33 /etc/shlink/vendor/laminas/laminas-stratigility/src/Next.php(49): Mezzio\Middleware\LazyLoadingMiddleware->process(Object(Laminas\Diactoros\ServerRequest), Object(Laminas\Stratigility\Next))
#34 /etc/shlink/vendor/laminas/laminas-stratigility/src/MiddlewarePipe.php(75): Laminas\Stratigility\Next->handle(Object(Laminas\Diactoros\ServerRequest))
#35 /etc/shlink/vendor/laminas/laminas-stratigility/src/Middleware/PathMiddlewareDecorator.php(62): Laminas\Stratigility\MiddlewarePipe->process(Object(Laminas\Diactoros\ServerRequest), Object(Psr\Http\Server\RequestHandlerInterface@anonymous))
#36 /etc/shlink/vendor/laminas/laminas-stratigility/src/Next.php(49): Laminas\Stratigility\Middleware\PathMiddlewareDecorator->process(Object(Laminas\Diactoros\ServerRequest), Object(Laminas\Stratigility\Next))
#37 /etc/shlink/vendor/laminas/laminas-stratigility/src/Next.php(42): Laminas\Stratigility\Next->handle(Object(Laminas\Diactoros\ServerRequest))
#38 /etc/shlink/module/Rest/src/Middleware/CrossDomainMiddleware.php(24): Laminas\Stratigility\Next->handle(Object(Laminas\Diactoros\ServerRequest))
#39 /etc/shlink/vendor/mezzio/mezzio/src/Middleware/LazyLoadingMiddleware.php(27): Shlinkio\Shlink\Rest\Middleware\CrossDomainMiddleware->process(Object(Laminas\Diactoros\ServerRequest), Object(Laminas\Stratigility\Next))
#40 /etc/shlink/vendor/laminas/laminas-stratigility/src/Next.php(49): Mezzio\Middleware\LazyLoadingMiddleware->process(Object(Laminas\Diactoros\ServerRequest), Object(Laminas\Stratigility\Next))
#41 /etc/shlink/vendor/laminas/laminas-stratigility/src/Middleware/ErrorHandler.php(129): Laminas\Stratigility\Next->handle(Object(Laminas\Diactoros\ServerRequest))
#42 /etc/shlink/vendor/mezzio/mezzio/src/Middleware/LazyLoadingMiddleware.php(27): Laminas\Stratigility\Middleware\ErrorHandler->process(Object(Laminas\Diactoros\ServerRequest), Object(Laminas\Stratigility\Next))
#43 /etc/shlink/vendor/laminas/laminas-stratigility/src/Next.php(49): Mezzio\Middleware\LazyLoadingMiddleware->process(Object(Laminas\Diactoros\ServerRequest), Object(Laminas\Stratigility\Next))
#44 /etc/shlink/vendor/php-middleware/request-id/src/RequestIdMiddleware.php(32): Laminas\Stratigility\Next->handle(Object(Laminas\Diactoros\ServerRequest))
#45 /etc/shlink/vendor/mezzio/mezzio/src/Middleware/LazyLoadingMiddleware.php(27): PhpMiddleware\RequestId\RequestIdMiddleware->process(Object(Laminas\Diactoros\ServerRequest), Object(Laminas\Stratigility\Next))
#46 /etc/shlink/vendor/laminas/laminas-stratigility/src/Next.php(49): Mezzio\Middleware\LazyLoadingMiddleware->process(Object(Laminas\Diactoros\ServerRequest), Object(Laminas\Stratigility\Next))
#47 /etc/shlink/vendor/shlinkio/shlink-common/src/Middleware/ContentLengthMiddleware.php(24): Laminas\Stratigility\Next->handle(Object(Laminas\Diactoros\ServerRequest))
#48 /etc/shlink/vendor/mezzio/mezzio/src/Middleware/LazyLoadingMiddleware.php(27): Shlinkio\Shlink\Common\Middleware\ContentLengthMiddleware->process(Object(Laminas\Diactoros\ServerRequest), Object(Laminas\Stratigility\Next))
#49 /etc/shlink/vendor/laminas/laminas-stratigility/src/Next.php(49): Mezzio\Middleware\LazyLoadingMiddleware->process(Object(Laminas\Diactoros\ServerRequest), Object(Laminas\Stratigility\Next))
#50 /etc/shlink/vendor/laminas/laminas-stratigility/src/MiddlewarePipe.php(75): Laminas\Stratigility\Next->handle(Object(Laminas\Diactoros\ServerRequest))
#51 /etc/shlink/vendor/laminas/laminas-stratigility/src/Next.php(49): Laminas\Stratigility\MiddlewarePipe->process(Object(Laminas\Diactoros\ServerRequest), Object(Laminas\Stratigility\Next))
#52 /etc/shlink/vendor/laminas/laminas-stratigility/src/MiddlewarePipe.php(75): Laminas\Stratigility\Next->handle(Object(Laminas\Diactoros\ServerRequest))
#53 /etc/shlink/vendor/laminas/laminas-stratigility/src/MiddlewarePipe.php(64): Laminas\Stratigility\MiddlewarePipe->process(Object(Laminas\Diactoros\ServerRequest), Object(Laminas\Stratigility\EmptyPipelineHandler))
#54 /etc/shlink/vendor/mezzio/mezzio-swoole/src/Event/RequestHandlerRequestListener.php(116): Laminas\Stratigility\MiddlewarePipe->handle(Object(Laminas\Diactoros\ServerRequest))
#55 /etc/shlink/vendor/mezzio/mezzio-swoole/src/Event/EventDispatcher.php(39): Mezzio\Swoole\Event\RequestHandlerRequestListener->__invoke(Object(Mezzio\Swoole\Event\RequestEvent))
#56 /etc/shlink/vendor/mezzio/mezzio-swoole/src/SwooleRequestHandlerRunner.php(135): Mezzio\Swoole\Event\EventDispatcher->dispatch(Object(Mezzio\Swoole\Event\RequestEvent))
#57 [internal function]: Mezzio\Swoole\SwooleRequestHandlerRunner->onRequest(Object(Swoole\Http\Request), Object(Swoole\Http\Response))
#58 {main}
[2022-11-11T13:17:11.629409+00:00] [redactediguess] Access.ERROR - - "POST /rest/v3/short-urls HTTP/1.1" 500 143

it's probably my stupidity so it's in the questions/support section but it can be a bugg.
Thanks for your help, let me know if you need additional info.