Defender prevents PSAmsi from working, so no malicious files can be scanned without powershell error message

[LukeProducts]

Hello all,

I don't know if I understood the wiki correctly and am just missing an embarrassing error,

in any case I wanted to create true / false values, but when I try to scan a malicious file with PSamsi, only the red error message comes up in powershell that the file was blocked by my antivirus, but also PSAmsi's execution is terminated...
So I can't get a true value for the scan anymore.
If I disable defender I get false and a warning for each malicious file, but that is logical in this case.

Does anyone know what I am doing wrong?

With kind regards
Luke