Firefly failing to allow image upload

Hello,

I'm having an issue uploading reference images to Firefly. The image is a design for a T-shirt which I have made and therefore own the copyright for outright. I was able to upload the same image 2 days ago and successfully generate output from Firefly anf Nano Banana from within Firefly. I have tried different image formats - png and jpg. I even have tried uploading other non-specific original images and these have also failed. However when I tried uploading an previously generated image it uploaded successfully. This is very frustrating as was able to work with the T-shirt designs as reference previously and now can not complete my work. PLEASE HELP.

Attached are the T-shirt design which worked previously and a test ref image which also failed to upload