If you need to contact a support group for Zowe, they will likely need a variety of information from you to help you. This page details a list of items you should gather to the best of your ability to provide to your support group. You may also find this list useful for independent troubleshooting.
Please review the list of information needed for general server support.
When the web UI such as the Zowe Desktop or Apps inside it have an issue, the root problem may originate from either server-side or browser-side behavior. In addition to the server logs, the browser logs should be gathered. They can be accessed by opening a browser's web developer toolkit. Most browsers allow this via pressing F12.
Read more about it here.