I’ve been successfully post comments on to issues created on my Jira Service Management instance by using create request comment API on Jira Service Management (Cloud) . However, when I tried to post a comment to an issue created by Backbone issue sync (Backbone Issue Sync for Jira | Atlassian Marketplace), I get the following error.
Has anyone encountered the same issue ?
{
“errorMessage”: “The request type you are trying to view does not exist.”,
“i18nErrorMessage”: {
“i18nKey”: “sd.customerview.error.vpOriginMissing”,
“parameters”:
}
}
Welcome to the Atlassian Developer Community, @LamontColyar!
This happens when the requestType of a service desk issue is not set. Can you verify if the request you are trying to comment on has a Request Type set? If it is set to None then that explains why your API call is failing.
If the above scenario is what you are indeed facing, I suggest that you check your Issue Synchronization field mappings and make sure that the Request Type is being mapped.
Disclaimer: I am not a member of Backbone issue sync team 
but I believe the scenario I described will cause the same error you are hitting.
Hope this helps!
Ian
Hi @ianRagudo,
Thank you for the response.
As you pointed out, the request type on the issue was set to blank and after I manually set the Request type, the create request comment API successfully went through. Again, thank you so much for your advice !! 
