Setting up a schedule in the Konnect+ app essentially denies handshaking outside of the scheduled time(s), so the car thinks the charging equipment is broken. Don't think it causes any problems, but the car treats it as a type of failure in terms of notifications etc.I have an Andersen and the Konnect+ app works fine with Octopus Go. Set the schedule up in the Konnect+ app and then just plug the car in. The car then sits there until the Andersen starts to supply power. The next morning I usually have a notification or two from the Tesla app telling me that charging wa iinterrupted at some point prior to charging starting. I guess that comes from the car knowing that's it's plugged in, it asked for power and gets none.
Looking at the stats in the Konnect+app I can see that no power was supplied before or after the scheduled times. If I want preconditioning then I just tell Konnect+ to manually open the taps.