Can't upload thumbnails

Hi. I am getting an error trying to upload thumbnails with documents. I get this error code: Unsupported operand types: string / string

I'm running the latest Joomla 5 and Edocman 3.3. Php 8.2. Can you help me fix this?  Greysheet.org is the website. 
Thank you,
Kim

 

Hi Kim,
To help you resolve the issue, please submit a support ticket in the Edocman category.
Kindly provide your site information and an administrator account so I can check and fix the problem for you.
Let me know if you need any assistance with submitting the ticket.
Best regards,
Dam