I got an reply from Tacx:
We are sorry for the inconvenience.
This is a known error with the latest firmware, the developers are working on a fix for this issue.
In the meantime you can downgrade the firmware version so this problem does not occur anymore.
If you want to revert back to the old firmware, please download the attached NeoDowngrade.tacxfirmware file and then forward it to your mail on your phone/tablet were the Tacx Utility app is installed
Select the file on your phone/tablet. You are now asked which program you want to open it. Select Tacx Utility app
Then connect the NEO
Then select UPDATE
Now update the NEO and you are back to the earlier version.
The Link to the mentioned firmware is: https://support.tacx.com/attachments/token/V4cfpZ6kbi0TojAqvQXXX27RB/?name=NeoDowngrade.tacxfirmware