CBlue wrote:
If you can't access your system admin, change the default theme in your database. Make sure you change it for your userid too. Then once you can get back into your site, update your system module and it wouldn't hurt to go to general settings and update module template .html files from themes/your theme/templates directory. Then go back and change that option to no again.
You will also need to delete all files (except index.html) from your templates_c folder.