Data related to admin account is corrupted in 1 of the database tables, probably from migrating database or something going on on your server side. Ask your server admin or web developer if they just did something with the database. Then that could be the reason. Other than that, I don’t think of anything else that stops admin from doing all tasks.
Thread Starter
nexaf
(@nexaf)
This is very weird, I checked every table from my D.B. and everything seems to be fine, I have not found something different in the permissions for example, even and revised table by table comparing it with another D.B. I have on another website and everything seems normal.
Although some tables, I’m not quite sure what exactly they should look like, but as far as I understand it seems to be normal.
Do you know what exactly table do I have to check for this problem?
Thread Starter
nexaf
(@nexaf)
Hey, solved!
the problem was visible but well hidden, it was a plugin or malicious code that added this code to the wp-config.php file:
define(‘DISALLOW_FILE_EDIT’, true);
define(‘DISALLOW_FILE_MODS’, true);
deleting this, I was able to install and update plugins and themes again
