Hey bro, I checked your url, you are getting this error in your console from google:
“auth/network-request-failed”
and No ‘Access-Control-Allow-Origin’ header is present on the requested resource.
(As I checked @bktulo website, your problem relates to part one and three, you did not config your google well or you are limit by google)
Two thinks:
1. check to have done this:
https://idehweb.com/send-10000-sms-free-with-firebase-in-plugin-login-with-phone-number-wordpress/
(**please be sure for configuring well number 4 in the url above, ok? it’s very important)
if you exactly have done this and again you have problem then we go to part two
2.disable all other your plugins and only check “Login with phone number” plugin, why? because other plugins maybe are importing “firebase” scripts in page, and it should be added once. so for more help, you can check your “view page source”, there check to have firebase only from our plugin.
3. if again your problem is not solved, check your server/host firewall and check your server connectivity to google, check with other server/ check with vpn.
This problem you have, does not relate to the plugin functionality. it’s working,
but most it’s because of part one and not configuring well. by the way, check on other webhosts/server to see if you are not limit by google.