aaP_odiditech
Hi. this is normal. Because the "self-signed certificate" is used in the panel installation, the browser does not trust the self-signed certificate, click Advanced Authorization and Accept
"If you choose to enable SSL (self-signed certificate), you will use https access panel after installation."
"After logging in, you can go to the panel settings and change to Let's Encrypt certificate."
"SSL will be automatically enabled in 10 seconds."