I am my custom domain in that I created subdomain using my custom domain I am getting this error and also while getting error site is not secure and I am able to submit any data or login
I tried this
Impletemented SSL certficate
Created .htaccess rule to redirect https
MySQL connection is all good working fine on Main domain but not on sub domain
img 1: connection is not secure
img 2: send information but redirected to the same page