Unable to turn ON Email Channel

Summary

If there's no Request Type in a project with Summary and Description field. Email Channel can't be turned ON.
Also, if there is another field that is Required

Steps to Reproduce

1. Create a service desk project
2. Hide Description on all the request type for the project
3. Turn ON email Channel

Expected Results

• Previously, the error message will show a helpful message if there's no suitable request type for the email channel

Actual Results

• Error message shown is not helpful to advise the user that there's no suitable request type for the email channel
  The default email account cannot be used because the inbox for it cannot be creted. Please refresh the page an if the issue persists, raise a ticket at support.atlassian.com

Workaround

• https://confluence.atlassian.com/display/JIRAKB/Unable+to+Turn+Email+Setting+On+In+Service+Desk+-+Request+Type+Issue+-+Required+Field