The content of the pages in the wordpress backend is not visible

[IAMPFAB]

The web site was developed (theme Psycheco version 2.0.0) by other developers. The wordpress version is 6.6.1 and unyson version is 2.7.3.1. In the page list some pages are associated to unyson, others to unyson and brizy. I suppose brizy was used by the developers in a second phase. Unfortunately nothing appears when clicking the update button. The php version is 8.1. I tried to disactivate other plugins, one by one, and I changed also the theme (base version of wordpress). Everything was unsuccessful. Could someone help me?

[ahrana]

I can solve this