Custom api connector with $filter not working in powerapps

[AnthonyDB]

Hey guys,

So i made a custom connector, Api endpoint: 

?$filter=

If i test my connector everything works just fine:

 

But... When i try to use my connector in my app:

Anyone who knows what the problem is? Also i tried making a Power Automate flow wich does the same job as the function above but this also doesn't seem to work.

Kind regards,

Anthony