Add Action Display Name

[Fabian_Weller]

In an Add Action I was using this Display Name expression:

IF(
COUNT([Fahrzeug].[Related Seites])=4,
" ",
"Neue Seite"
)

Since today my App stopped working because of this error:

I understand the message. This is because we cannot use columns in Add Actions.

But the bad thing is, that my App was working several months and today it stoped.