I have updated my 5.6.36 installation to 5.6.60 (latest version). My own hosting, own template.
Now when I click certain menu's, such as Surveys and Templates, I get the error:500: Internal Server ErrorInvalid material template directoryData integrity shows no problem.
Anybody any idea where to start looking for this problem?

Kind regards,
Auke

I second that question. Some templates (pages 1-2) show in the template overview, page 3 throws an error message. Attempts to get a survey overview result in the 500. Compared the relevant filesystem structures with a recent backup, all looks as before.

Best Regards,
Lasse

It was fixed in the monday version : github.com/LimeSurvey/LimeSurvey/commit/...ffff507150ec2fccaf6c

You have broken template in your database (template without directory), sorry : i don't found the way to reproduce before push another fix before : github.com/LimeSurvey/LimeSurvey/commit/...c3c5adc8fa6bd8ea7a59