For the umpteenth time, still on the same site, installing a new version of SP PB (this time 5.1.7) gives me the usual error in the subject. I followed all the instructions regarding SP PB module permissions to Super User, but they were already in place. I reconfirmed them but nothing. I cleaned all the caches, disabled JCH Optimize but nothing, the error is still the same. At one point it also gave me it on 5.1.4 (and it is among my past tickets) but when I installed 5.1.6 it didn't give me error, while with 5.1.5 it did. Now, all over again, it's giving it to me again with 5.1.7. At other sites with the same configuration, the installation did not give me any problems. I also tried with other browsers, just in case, but nothing, same error. I just don't know what to think anymore. I even tried deleting SP PB and going directly with the 5.1.7 installation but the error is still the same. It seems to be missing a file or folder but I really don't understand what it is, not knowing PHP. I hope you can find the knot in this puzzle, because it's driving me crazy.... Thanks for everything!

this is the screenshot of the error: https://prnt.sc/Zw_79w5gdmEF