Tried opening the DOP file on my Windows PC (latest PL version 4.1.1) from this thread.
I get internal error. After some tries I deactivated the watermark, then the image can be rendered.
I assume there is a better way to display an issue like this to a user.
A more descriptive error message like “Font for watermark not found” or “Error resolving watermark definition” should help a user to find the problem easier.