Issues using briefcase on an encrypted form with rank

1. What is the problem? Be very detailed.

I have a form which includes multiple rank questions, and the form needs to be encrypted for the project. When running through odk xform converter, no issues pop up, however the following error occurs when using briefcase (v.1.11.3 and later versions).

Fetching form definition
resolving against briefcase form definitions
Error parsing form definition: org.opendatakit.aggregate.exception.ODKIncompleteSubmissionData: Javarosa failed to construct a FormDef. Is this an XForm definition?"

2. What app or server are you using and on what device and operating system? Include version numbers.

Latest ODK collect, on multiple android devices. This version was hosted on a kobo server for our pilot, but will be moving to central for roll out. (Is kobo the issue?!)

3. What you have you tried to fix the problem?
I have used different briefcase versions. other forms without ranks all work.

4. What steps can we take to reproduce the problem?
I have attached the form incase anyone has hit simillar issuesWash_weekly_all_qs_SA_v.2.0.xlsx|attachment (62.0 KB)

Rank types highlighted in green! there's a few.

5. Anything else we should know or have? If you have a test form or screenshots or logs, attach below.