Links didn´t work...

[photo-tirol]

Hi,
Please help me. Few months ago I have create some entitys. This week I change some fields and add some conditions. After that, i get an "Error 500" warning. I reset my changes. Now, the links didn´t work. If I click on my user, it didn´t open. And the same with the links to my entitys.
How can i fixed this problem, need this for my work

I have tried: clear cache and Rebuild

Version: 4.7.1

thank you very much
kind regards
Mario

[photo-tirol]

if i create a new entity, then i have the same. the link did´nt work...

[Maximus]

Hello.

This week I change some fields and add some conditions.

How did you change it? By using UI or code changing?
Check the logs, please. Error 500 could be the server error so please check the server error log as well.