Since today no text frames

I suddenly have a big problem!
Since today I have a huge problem. Working on my website, I no longer receive text frames in xerte. I tried different laptops and browsers and I don't see text frames on my ipad anymore.
Are there more users who have or recognize this problem? And ... how can this be solved?

Ronald

I suspect you made a mistake when you changed one of the central files used by the editor.

You can verify that by using Chrome, and pressing F12 when you are in the screen you show in the screenshot.
Check whther there are any error messages in the 'Console' in red. If there are, it normaaly also indicates in which file, and on what line.

I came across several red lines, most of which said nothing to me. In order to continue working quickly, I restored a fresh backup and everything works again.
Ronald