Hello Niklas,
Thanks for the new version. I installed and tested it right away.
I did one test myself and 1 test from a real customer and i don’t see any errors anymore with Woocommerce Bookings v1.1.5.30 (most recent).
However both orders are still on “waiting for payment” in woocommerce, while both are paid. In the side bar i see the notice “Mollie – iDEAL betaling gestart (ord_pycfbw).”, but it doesn’t receive the payment succesfull information..
If you want to have a look on my site to see any logs or so, please let me know.