Welcome the Technical Support section. Help us in assisting you by providing us with a concise and descriptive elaboration of your issues. Be specific and if possible, provide us with a step-by-step instruction in replicating your problem.
Upgrade from 4.0.9 to 4.1.2 via iJoomla installer froze while updating database.
It now shows as updated in iJoomla installer however there was a missing field in the table _community_files
according to the error shown in the Chrome console.