Starting SNA-DFW-LHR-PRG tomorrow (had to double stop due to limited flights to PRG right now and only one BA AM flight)

For DFW-LHR had to do a PLF as it didn't see it as a connection (one ticket/one itin with the AA codeshare with BA) - required the PLF, did one and selected exemption, Airside Transit. Verifly accepted it, my vax cert and the other click through "Yes's" - all green and "Ready to Travel" - however online check-in says "Unable to check-in, Online check-in is unavailable for this location. Please check in at the airport"

Will edit this tomorrow on verdict if SNA folks used Verifly info - likely issue is LHR-PRG and compliance for that (did the Czech PLF already and meet their requirements)