can't log in to my site

Try manually resetting your plugins. If that resolves the issue, reactivate each one individually until you find the cause.

Rename simple-twitter-connect folder via FTP or cPanel

edit – ok, was too slow in posting ??

Fatal error: Call to undefined function is_network_admin() in /mounted-storage/home146/sub007/sc78505-EGMN/punediaries.com/wp-admin/includes/template.php on line 1665

When I try to log in to my dashboard I get the following error please help me

Stop, stop, stop… Go see the response in your first post.

https://www.ads-software.com/support/topic/wp-login-fatal-error?replies=6#post-2078340

I’d usually say that in the future, posting your own thread instead of piling your question on several threads that are months old, may be more effective, but… ??