Hi @alexant14 Welcome to the forum!
There are many posts about this recently.
- v4 extension requires at least v3 API (you have 2.13.5)
- v3.x API requires at least php7.4
- You need to upgrade your passbolt
- temporary access is restored with v3 extension downgrade
See Passbolt v4 beta testing is now open 🚀 - #2 by garrett