My host updated PHP to 5.5. last night. Now, I can't login to my Joomla back-end because of an error. It says that CiviCRM does not have permission to write temp files.
What can I do to make sure that I can login to Joomla again? I was thinking about:
a) Deleting all files in media/civicrm/templates_c or
b) Disabling all CiviCRM folders
Any help or tips would be great.