Issue Summary

When an API call using Basic authentication is sent to jira, and the authentication method is disabled, the server returns a different error message depending on the API endpoint targeted.

Steps to Reproduce

1. In Jira, navigate to Settings > System > Authentication Methods
2. Disable the feature "Allow basic authentication for API calls"
3. Fire an API call to Jira using Basic Authentication
4. Fire a second API call to an internal endpoint

Expected Results

A consistent error, like this one below

{"message":"Basic Authentication has been disabled on this instance."} 

is returned for all API calls to Jira when Basic Authentication is Disabled

Actual Results

The error message changes depending on the API endpoint used in the API call with Basic Authentication.

For example, if you hit: /rest/issueNav/1/issueTable, Jira responds with:

{"errorMessages":["The value '{project}' does not exist for the field 'project'."],"errors":{}}%

Workaround

Currently there is no known workaround for this behavior. A workaround will be added here when available