So…I was running rclone from within the (main) Termux session. On a whim, I decided to rclone from within a SSH session (using the Secure Shell app). “autoconfig = yes” continued to throw the same error. However, “autoconfig = no” succeeded after the copy/paste of the code from the browser into the ssh session.
So…it appears that there is a problem with the paste into the Termux session.
Thanks for the help! Now I’m off to play with rlcone…