Issue Summary

In Assist, when an user enters an invalid URL in a custom field of type URL (or with >255 characters), a generic error message is shown, instead of specifying that the failure is because of the invalid URL:

Steps to Reproduce

1. Create a Request Type form with a URL Field
2. Setup JSM Chat on Slack 
3. Configure the Request Type with the URL Field onto a Request Channel
4. Try to raise a request through Slack using Assist
5. Provide a URL with >255 characters OR without the correct URL syntax expected by the field. For example, enter www.atlassian.com instead of https://www.atlassian.com/ 

Expected Results

The Assist bot should mention display an error message indicating that the URL entered was invalid, instead of a generic error message.

Actual Results

A generic error message is shown:

Something went wrong. We were unable to create a ticket. We've notified the agents for this channel. 

Workaround

1. In case you need to accept different URL formats, consider using a text field instead.

Or:

2. Add a hint in the "Display description" section of the Request Form:

This will be displayed as follows in Assist: