No data returned from REST API call on some SD custom fields

Summary

No data returned from REST API call on some SD custom fields. It happened for these two types of custom field:

• sd-sla-field (i.e Time to Resolution)
• vp-origin (i.e Customer Request Type)

Steps to reproduce

1. Create a new SD issue
2. Run https://<instance URL>/rest/api/latest/issue/<issue key or ID> to get details from issue in step 1

Current Results

Getting The REST API JSON builder is not available via OSGi message

Expected Results

It should return the data of that custom field.