Hello Paul,
Update:
Thanks so much again for your kind tips. I Drop the whole Database with phpMyAdmin and Restored from a three days down Backup before the update to SPPB version 4 and everything went well with any problem. Apart from that I have my Pages back and only some few editings to make.
But one thing I realized after the Downgrade was when I tried to create a new Menu when my Welcome page won't load, there was this strange line under the Menu Item Type-> SP Page Builder:
COM_SPPAGEBUILDER_DASHBOARD_DEFAULT_TITLE
COM_SPPAGEBUILDER_DASHBOARD_VIEW_DEFAULT_DESC
Screenshot:
https://prnt.sc/wg0OC6IwdTyh
But after the Database restore it's still there. What is it?
What does this message mean and how can I resolve it.? Because it does not used to be there.
Thanks in advance.