Encountered this error: data value too large: The call to the EchoSign web service call to send an interactive document returned an error message

Full Error:

Encountered this error: data value too large: The call to the EchoSign web service call to send an interactive document returned an error message. Unable to send on behalf of user. Sender has not accepted Adobe Sign terms of use and error code EXCEPTION (max length=255).

Update failed. First exception on row 0 with id : first error: STRING_TOO_LONG

The only change to user's login is her SF username and email; the user never had an issue until that; if that helps or is it related or something else?

Any ideas?