The error message is telling you to go and check the file permissions of your site. You can read about them here:
http://codex.wordpress.org/Changing_File_Permissions
Several months ago wordpress stopped renewing plugins automatically
By default, WordPress has never updated plugins automatically and there are no plans to do so in the future as far as I am aware. Automatic minor core updates were introduced in WordPress 3.7.
Have you checked the permissions on these files? Are they 644?
Thanks.
Sorry, I did not express myself correctly about “automatically”. I meant that wp shows that I have plugins and I need to update them, so before I could go and press the button “update”, put password, ect. And after I could see that there are no more updates.
But now I do that (all the same like before), but wp keeping saying that I need to update the plugin.
So I needed to do it manually, using FileZila, and it is very uncomfortable!
About file permission: The hole folder “includes” has 777, and everything inside also.
I´ve change permission of update-core.php to 644. It did not help. Shows the same phrase when Im trying to update.
Are there other thing I need to change to 644?
Manually delete wp-admin and wp-includes and install a clean version of WP. There may be something stupid sticking around. Keep in mind, your data is SAFE 🙂
Should I put wp-admin and ap-includes of new version of wp or of the one I have?
The one you have, for now.
Well, i tried with one I have and with new version and nothing changed. The same phrase and problem appears.
Any more ideas? What else can I do?
