I've seen this issue elsewhere on this forum with no workable solution even from TP-Link support.
When I connect to my router (https://tplinkwifi.net or tplinkwifi.net) I get a request to create a password. When I do that, I get an error "Invalid RSA Public Key". I can't continue from there.
Per all the other forum entry "solutions" I've tried the following:
I've used Chrome and Chrome incognito, Brave, Firefox, IE, Safari (on my cell phone) with the exact same issue. I've re-tried after clearing browser history/caches for the browsers with the same issue. I've rebooted my router and pulled power for 1-minute+ with same issue.
Is there some superuser or TP-Link support specialist that can give a definitive/validated solution to this?