As the administrator of the website, I can't install or delete plugins.
- It's not a multisite install
- I have replaced wp-admin and wp-includes folders with fresh ones.
- It can't be because of the folder permissions (I copied the website on localhost-Windows and the problem is the same)
- I have deactivated all the plugins by renaming the plugins folder
- I have activated the default theme
- In the database, the user level is 10
- in the database, the capabilities is a:1:{s:13:"administrator";b:1;} https://prnt.sc/STgHnqwXJgjz
Note: the database tables don't have a prefix
Does anyone know what else could I do? Thank you!