I am unable to fly most if not all the planes I purchased prior to the PRO monthly subscription rollout on Fly Solo mode due to the above error code. The only planes I CAN fly are those included with the initial app purchase.
I did find a discussion regarding this in your archives from 2020, but it did not resolve the issue after following the recommended steps - closed and opened the app numerous times. Uninstalled and re-installed app.
Thanks in advance for your help.
Device: ipad pro 12.9:
OS: 16.4.1