MetaModels Input/Output Settings : Internal Server Error

[penetro]

Hey there,

I have trouble using my MetaModels installation. Everything works fine, except the Input/Output Settings. When I click on the little icon next to any of my MetaModels, I get redirected to a blank page with 500 status. After I had freshly installed MetaModels, I had similar issues with other MM features, which vanished though after I cleared the cache. I installed MetaModels manually (without Composer), if that makes a difference.

I use
latest MetaModels nighly build,
Contao 3.4.4 and
XAMPP 3.2.1

This is the first time I work with Contao and MetaModels. I coundn't find any other person with the same problem yet, please help

[Spooky]

latest MetaModels nighly build

1.0.x, 1.1.x or 2.x?

XAMPP 3.2.1

Hm, as far as I know, there is no XAMPP 3.2.1 version. Which version do you use exactly?