Receiving error after uploading documents in on-boarding checklist task

Summary

Defined a checklist task that allows attachments. Received error after uploading and clicking complete button

Content

Hello Experts,

Please advise on why I am encountering this error when creating a document types from scratch but not when using delivered document type such as 'Employment Agreement'.  I created an on-boarding task that allows for attachments of documents.  

Configuration are as follows:

1. Define Document Category

2. Defined Document Sub-category

3. Defined Document Types (See Screenshot Fig1)

4. Set up Checklist Task (See Screenshot Fig2)

5. Allocated the on-boarding checklist to pending worker.  Btw, I created a role for this pending worker that allows the for viewing and updating document records.