Hello experts,
I am getting an error in IW42 that 'fill in all required fields' but the field highlighted is only a text field and nothing I enter there is making the error go away.
I have created a notification in which under the section 'Items', I have entered a cause code (Catalog- cause).That notification has been adopted to create a PM order and I am doing IW42 against this PM order #, when I get this error.
Firstly, I cannot see where in the PM order, this cause code info is saved but in IW42 , under the window 'Causes', this cause code is appearing.
Secondly, I am unable to proceed because I get this error "fill in all required fields".
See the screenshot below.

When I first enter the transaction, I get an informational message "Customizing Incorrectly maintained". I initially thought if that is the problem but in a different system, the same message is coming but I am still able to proceed with the confirmation of the PM order's operations.
Aby suggestions as what might be causing this problem?