Error message uploading media : cannot store with the media type "text/html"



I am using OMeka-S 1.3.0 in a WAMP with Apache 2.4.37 and PHP 7.2.14.
When trying uploading a media in jpg or png, i get the following message : "cannot store with the media type “text/html”.

Could you help me finding out the error 's cause ?
Thanks in advance for your help,



I think, I understood my mistake as my media was recorded in the map tab. So I tried to upload my map as a media but I get then the following error message : “Omeka is encountered a Mistake”.

Many Thanks if you can help me !