Ciao, If I may... install SPPB 5.0RC3 >> https://www.joomshaper.com/forum/question/25555
SPPB 4.0x will we replaced with SPPB 5.0 in next weeks. SPPB 3.x support is planned only till end of Aug 2023.
please write a tutorial for downgrate back to 3.8
We don't plan that, sorry. But On forum I informed at least 10x times how to do that.
And in general, it depends how long you have used SPPB 4.0x - becuase maybe using full website backup would be the best option if you edited few pages already. If you don't have backup, your hosting provider has it.