Server Error 500 on every Ajax Call we have a problem that we get a internal server error on about every ajax call. The example below happens when editing a view clicking "add filter" and directly click on abort. It also happens when making changes to a view. At first glance the change seemed to be ignored but after refreshing the pages the changes will be visible.



When accessing the URL which throws the error we get a valid json string (checked with jsonlint.com).

Our server logs sadly show nothing interesting. I would appreciate any kind of hint where to look for a solution. 

Edit:
The nojs version seems to work fine but that's no solution in the long term :/
Look at your PHP error log. It should give you the file and line number it's having an issue with.

If you can, copy and paste the last few lines of the error log on here for us to look at.