Every time I try to send a message with a photo attached or just a photo itself to a buyer, it says there is an error and tells me to contact Etsy support. Can someone at Etsy? Please tell me how to fix this.
We here in the forums are just sellers like yourself. There is nothing we can do that you cannot do yourself. Etsy personal do not come here or read the threads--except admins who can either move or close threads--that is about all they can do--they are not tech.
For this you ARE going to have to contact Etsy support.