I can't solve this problem. This started after I created a new sub domain. I can't update my plugins, install, delete.
During an update it says "successfully update". After I goes back to my
plugin.php it needs to be update again. I can't delete the plugin even it says "successfully deleted". And also installing a new Plugin it says "successfully bla bla" but nothing happens when I go back (or refresh) my
I tried file permissions but no luck.
So I Update my plugin manually.