The element in your flow has validation errors - posting to chatter with text template

Question

I'm trying to post to chatter via flow mentioning a user. However it is returning the error: The element in your flow has validation errors

I have the following in my text template:

@[{$User.Id}] This is a test.

What am I missing here?

Answer 1

Kindly check all the variables that are created in the flow. Even if this variable is not used in this process because it is present it might cause an issue.