Hello, I plan to upgrade joomla to version 4, but before that I decided to upgrade SPB to version 4. The engine has been updated, but now a white screen appears when editing an existing page https://prnt.sc/RNS0p22M1YYl .
The site itself is on a test subdomain http://new.besedka-dacha.ru . In the future, I want to do everything on the combat site. http://besedka-dacha.ru , therefore, I ask for prompt help with an indication of what to correct. So as not to do the work twice.

