I, too had a couple of short test missions that gave me the “invalid parameter at waypoint”.
I checked and re-checked the waypoint actions and settings, and have been unable to figure out the cause of the error.
All other missions (created using Mission Hub V1 or V2) have flown successfully on a Mavic 2 Pro or Air 2S.
Here’s one of the short missions that gave me the error message.
@Tiffany , if would like to share your mission, I’d like to have a look at it.
If you aren’t sure how to share a mission, here’s some information.