Why am I getting this error "You are not allowed to create options"

I am just uploading a single image that is under the appropriate size and the number allowed by free.

Hi Dominic,
can you send the link to your PollUnit to support@pollunit.com?
Then we can have a look.
Kind regards
Philipp

Hi Philipp, I am also having this issue and have sent an email to this address. Can you please help?

Hi,
Can you maybe send one of the failing submissions to philipp@pollunit.com?
I could not see a problem when submitting an image.
Kind regards
Philipp