500 - Internal server error

[Nettie]

I have installed two new fresh versions of 1.11.2 and get a random 500 - Internal server error in front end when choosing a page in the menu.

The error message appears on each item in the menu - but only every now and then. I didn't change any settings or do anything to the installed version.

I tried different standard templates, and get the same issues on all of them.

The sites are installed on a IIS server. I have serveral sites running on the server that i havent upgraded to the new version yet. There are no problems with them.

What can I do to figure out where the error appear?

The error i get:

500 - Internal server error.
There is a problem with the resource you are looking for, and it cannot be displayed.

[flmm]

Check the log file for the error (apache log). Can be a lot of things. Most of the 500 error I had in the past were caused by mod_security. In the logs you see that mod_security blocked the page than.

You can also use the webdeveloper in Chrome (F12 or Command + Alt + i on Mac). There you go to the Network tab, refresh the page, and you are able to see what is loaded, and what not.