It looks like the last couple of times you’ve tried to use Zwift from your iPad, your Tacx hasn’t been paired. I also noticed you have a Macbook, iPad, and an iPhone all logged into your account at the same time.
This isn’t going to resolve your riding issues, but it’s not the best idea to have multiple devices logged into your Zwift account at the same time. Multiple logins can prevent activities from uploading properly.
Bluetooth is a bit peculiar in that it can’t be paired until it’s been unpaired first. Since it seems you’re trying to connect over Bluetooth, it’s likely that your Tacx is still paired to one of your previous devices.
While you’re going through and logging out, you may want to check the Paired Devices screen on each device. If any of the squares are blue, tap them to turn them orange and unpair your Tacx, then log out.
If you can’t find any pairings to previous devices inside Zwift, please double-check the Bluetooth section inside your Device Settings. If you find any connections made in there to your Tacx, tap and unpair or disconnect them.
Assuming your Tacx is no longer paired with previous devices either inside Zwift or in your device’s Bluetooth Settings screen, it should pair with whichever device you prefer to use.
Please let me know if you’re not having any luck finding previous bluetooth connections.