Mannuel Update not working

We click on the manual update button and then we get this reply..

Congratulations. AWPCP has been successfully upgraded. You can now access all features. Click here to Continue.

And once we click we get this:

You do not have sufficient permissions to access this page.

And update does not go through

https://ww.wp.xz.cn/plugins/another-wordpress-classifieds-plugin/