The error is related with the general upload feature .
You need the fileinfo extension enabled , check your php installation and, if need change , contact your provider .

Permissions:
docebo need write permission on folder "<web-root>/files" and all the descendant tree

It's a problem with the js that handle the 'question bank' page. To fix , you must edit ajax.quest_bank.js in folder doceboLms\modules\quest_bank with a text editor and add the above two lines just after line 259 , {key:"mod_quest", label:QB_DEF.mod_quest_img, formatter:this.formatModQuest...

avrebbe per voi qualche utilità ?