Recently, Gododdy hosting is having various issues with .htaccess and its nightmare for Joomla! administrator if you are running SEF URL or using product like sh404SEF.
Please try following possible solution to address your problem.
In Joomla! Turn OFF all the SEF options.
Its important to know, GoDaddy does not process the .htaccess immediately. It can take up to 24 to 48 hours for your .htaccess file to process.
Remove existing .htaccess from the server and use the htaccess.txt file delivered with out of the box Joomla.
Rename htaccess.txt to .htaccess
Use notepad to edit the .htaccess file. At the top of the .htaccess file add following lines:
Uncomment the “RewriteBase /” line remove the #
Save the .htaccess file and upload the file to your server. Once the file is uploaded turn “ON” SEF options in Joomla!