This is a known bug. It also occurs with Invoices and Bills. My ticket has been passed to the technical team. I'll update the ticket when I have a resolution.

We are facing same problem. I tried same on v15 and there it is fine.

A "due date" makes no sense in this case, as we want to book an outstanding payment! And a payment can not have a due date, per definition... We will open a ticket...

Im also facing the same issue. Did you by any chance get a feedback of the ticket?

I am also facing the same challenge. Where could i have missed something?

Same issue. Using Oddo16 CE running on docker. Version is: 6.0-20221116 (Community Edition)

Occurs if expense "paid by" - "Company" is set. And actually for me the error does not show up when approving a report, but directly after when trying to post the journal. So the transition from status "approved" to status "posted" does not work.
Everything works fine when having expenses "paid by" "employee" for the entire process

Same here, happens when selecting paid by company in expenses. Odoo version 16+e-20221117 (Enterprise Edition). 

I opened a ticket (#3 081 018) hopping this will be resolved soon.

I also faced the same issue and now odoo has fixed it