local dev. Trusted self signed certificat does not work

Hello,

I locally develop a https website for tests.

I created a self signed certificate from IIS following the below video and it works well but I get the warning DLG_FLAGS_SEC_CERT_CN_INVALID - Edge and the same with Chrome.

https://www.youtube.com/watch?v=MFikeLC-Ed4

So I do the same than in that video to trust my local certificate.

https://www.youtube.com/watch?v=R59Lx3nE_to

But no change. Nothing working!

May you help, please?

Regards