Can't send e-mail notification

0

Hello,
I've upgraded my Webcon only yesterday and today it seems that there is a problem when sending configurable e-mail through action. The action is simple and it worked until now (previous version 2023.1.1.89). When the action runs it returns an error "Can't send e-mail: Column 'mail' does not belong to table Results.". The field used in the action is named "Procedujacy" and is the type "User or group" with the data source . I am sure it worked before, what can be the problem here?

EDIT:
Seems that when I opened the action config and changed the used field to another one and then back, I was allowed to save the process. And now the action runs with no error... If I have to do the same in every action in every process, this would be a big inconvenience :(