Text of modular Site does not update although it says "Successfully saved" after pressing "Save"

Hello,

I am not able to update my texts on my modular Getgrav site. Video for reference.
https://www.dropbox.com/s/x2vyq1a1ypanvpz/video.mov?dl=0

I have the latest version of Getgrav (1.5.6).

Modular pages usually need to clear cache to see new changes. If you are in terminal, run this cmd

sudo bin/grav clear-cache

If you are in the admin page, there is a clear all cache button above.

Thank you for your reply.

I have already done that, but the changes are still not shown on either the website itself or in the Getgrav editor.

Edit: The Expert-Mode works, but not the Normal-Mode when editing a page.