Major picture uploading issue on marketplace

[Harper Firehawk]

     As of today I've tried to upload pictures for my gachas in my store on the marketplace that are currently inactive on my listings...just a few days ago I was able to use the same picture I was trying to use today for one of them and it kept coming up as an error... even though I had it as the right format I decided to make it the sizing they wanted and made another copy in the other recommended formatting... yet the error still came up ;n;

     below is what kept coming up regardless of what I did to try and fix it, pictures use also included.. please help-

 

["Attachment content type is not one of the following supported image formats - jpg, png, gif"]

Image requirements:

• Minimum dimensions: At least 512 x 512 pixels.
• Recommended dimensions: 700 x 525 pixels (W x H). Larger images will be resized to fit within these dimensions.
• Aspect Ratio: The aspect ratio of the above dimensions are 1:1 and 4:3, respectively.
• File type: PNG, JPEG or GIF.