Problem loading page, reloading in 5 seconds

After LogIn this message “Problem loading page, reloading in 5 seconds” is displayed.
This Message is showing sporadically by file und folder navigation.
By clicking on the “shared with me” link on the left side, the message is allwas displayed.

PHP
Version: 7.0.6
Memory Limit: 512.0 MB
Max Execution Time: 3600
Upload max size: 513MB

The nexcloud.log shows no entry!

Can you help me?

Answer "Problem loading page, reloading in 5 seconds"