You cannot enter ‘Complain Code=FIELD(Complain Code)’ in FieldNo
And again the same answer applies: dynamicsuser.net/…/478759
There is really no reason to copy paste the same error into a new question, if only the table and field references are different.
Alright, I clicked on Page Action the View Menu which lead me to error, from either or click properties to edit RunFormLink to default.