I followed this step but after clicking the next button, I got this error
I was unable to proceed as well, you are not wrong. Report this on
https://github.com/spesmilo/electrumIt is a bug.
I tried it on Desktop Electum and it worked. But not working on Android. Maybe a lower version may work on Android. But best is to report it so that it can be solved in the next update, or use desktop version of Electrum.
I gist OP is right maybe you should report this types of problems to the support @electrum.co.za. Or still you should get a new version for the windows