What was the last thing you did to the site? The error is saying the theme is the problem however it’s usually a plugin that causes these issues.
Do you have backups? https://wordpress.org/plugins/backupwordpress/
If not login via FTP or CPANEL and try deleting your current theme and plugins by moving them all to a new folder named whatever you like. Just not something WP uses.
They are all in wp-content/plugins/ and wp-content/themes/
Make sure the default WP theme is still in the themes folder, or download a fresh theme and place it in the themes folder (pretty sure it should load without one, but best to have something there). Then try to login again.
That sounds like your functions.php file is corrupted, try reinstalling the file to your theme folder
bikermanirl
Sir how can I do that I cant access my wordpress blog?
Can you access FTP or CPANEL ?
gcampton
sir how to use cpanel or ftp?
ooooooooooo K.
So how did you install WordPress without knowing how to use CPanel or FTP?
To answer your question you log in to FTP using a FTP program like FileZilla. You access CPanel by going to your server address and logging in using the credentials your hosting provider gave you.
Google is your friend. Instead of waiting 18 hours for my reply to “What is Cpanel or FTP?” you would have been able to get that information instantly. Interwebs 101.
