Hello Toufiq,
thank you for your answer.
At the moment i must restore the full website to the last backup, because my client need a working website.
So ther are no problems in the moment, but all is not up to date.
After the turn of the year I can try again and then describe the problem in more detail or give an administrator access.
As mentioned, I don't know that from Joomshaper and have never had any problems, except for this moment, which really destroyed a lot of the layout and the functions.
I'll report to the forum when I try the update again, okay?
Thanks and happy new Year!