Fatal error: Class 'JoomFishManager' not found

After copying a Joomla website, you might stumble on this kind of error :

"Fatal error: Class 'JoomFishManager' not found"

Solution:

Disable the mod_translate from the Module Manager.

- or -

Disable it directly in SQL (if you cannot access the admin page):

In the SQL table [prefix]_modules
- Find the row with name "Direct Translation"
- Edit on that row the value published => 0

Also if it doesn't work, do this too:

In the SQL table [prefix]_plugins:
- Find the row that sounds like this : Joomfish - Missing_translation, missing_translation
- Edit on that row the value published => 0