Page not found when attempting to log in using LINE social login

After setting up a LINE channel ID and secret ID for my Japanese client, I attempted to log in using LINE social login with an Indian Gmail account. However, logging in with an email and password wasn’t successful. Then, I tried scanning a QR code, but upon redirection to our site, I encountered a “Page not found” (“https://prnt.sc/opSIatEDdGy4”) error.

I have used this callback URL: “
https://bic.wp.anasource.com/SuperSocializerAuth/Line” and it redirects to this URL: “https://bic.wp.anasource.com/SuperSocializerAuth/Line?code=aYVh1XfPhTin87XUQtNM&state=1600092560” when I’m trying to log in with Line social login.

The page I need help with: [log in to see the link]