I am trying to activate a plugin. It says as if the plugin is activated but when I am trying to open the plugin's settings page it's says I don't have privileges. When I activate a plugin and then refresh the plugins page, it's as if I did nothing, the plugin isn't active.
It's the same when trying to deactivate a plugin. It looks like the plugin is deactivated but when refreshing the plugins page, it's still active.
It doesn't matter what plugin. It's happening with every plugin.
Does anyone know why is it and have a solution?