Trying to generate the file request link in an email without subject, clicking the button no longer appears the error window indicating missing subject.

Steps to reproduce:

• open a new email in the editor without filling in the subject field

• click on the button at the top right "Request upload on personal cloud"

Expected behaviour:

• an error window appears indicating that the object is missing

Actual behaviour:

• nothing appears and the button appears not to work

The attached error message appears in the browser console

Ticket ref: #155885