What was done before the problem appeared?
Upgraded from 1.40 to 1.41
Received "phpBB : Critical Error Could not get theme data for themes_id [1]"
What was done to try to solve the problem?
Followed MANY different instructions found searching these forums.
Deleted cache files (on board and in browser)
CHmodded /includes/def*.php to 666
Resynced 3x
What I ended up doing is editing the def_themes.php file. It was looking for theme 1. I didnt HAVE a theme 1. I found the theme that I defaulted my board to, which happened to be 7. I edited the line
"7 => array('themes_id' => '7', " to be "1 => array('themes_id' => '1', "
SUCCESS!!
YAY!
Sprung