No notification-type set ("Unbekannte Option") in Gateway after update to 2.0

[janborg]

After updating the notification center to 2.0 with a previous gateway “e-mail”, the gateway type is set to “unknown option” after the update, as apparently no migration exists.

In this state, the language is no longer visible in the notifications and no more notifications can be sent. Only after the gateway type is set to (the only option) Contao-Mailer, you can see and edit the languages and notifications are sent again.

A migration for gateways email -> mailer would be useful or at least a note in the UPGRADE.md that the gateway type must be corrected manually after the update.

Jan

Contao 4.13.40

[aschempp]

see #328