I am happy to say I have found a solution to my problem. I fixed it by going to the my channel page. Then I clicked on settings. Then I clicked info and settings. Then I clicked edit channel URL. I entered a new custom URL. I chose a name as close to the user name as I could get. This caused the URL to change from /channel/ifneofjie3383eid etc. to /user/"name". I wonder if the app is coded to always look for a path starting with /user rather than /channel. I do not need to use two step verification or app specific passwords. Problem solved!