IMAP Source fails to import

Hi there,
I started using Mayan with the default docker-compose preset, but I am unable to configure the e-mail import via IMAP.
Mayan authenticates correctly and emails will be deleted after import, but all I get is an email_body.html with 0 pages.
The logs produce the following line for each imported mail, but I can’t figure out what that means:

[2023-11-17 13:07:45,600: ERROR/ForkPoolWorker-2] ^[31;1mException determining page count using Pillow; cannot identif
y image file <File: /var/lib/mayan/document_file_storage/<UUID_OF_FILE>

I would appreciate any help to point me in the right direction.

Best Regards

Will look into this.

Thanks for the report!