Hi, is there a limit to the amount of images that can be added per day/ hour to tickets?

A ticket comes in, i reply like a normal email.. then i comment in private with a screenshot that xyz was completed.

The first few times its fine, after i try uploading to a third or 4th ticket i start getting the above error.

So im left to assume there's a limitation with Zoho Desk?

I tried uploading an attachment here and i'm getting a similar error