Wordpress wp-login.php login not working after installation

Please advise why the auto generated password for wp-login.php is not working after installation via option 22.
Accessing URL: https://mydomain.com/wp-login.php
Other details:
CentOs7 from DO
LetsEncrypt
Cloudflare
Thanks!

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Hi eva,
The HTTP password protected userpass that is generated.

Thanks

 

I'm also having not secure warning when access my wordpress site domain via https://mydomain.c0m. I follow the LetsEncrypt prompt during installation. Could it be the reason why the HTTP password protect is not working?

I set it to
Full - Encrypts end-to-end, using a self signed certificate on the server option
and the warning is gone.
Setting to Full (strict) and Flexible makes my site not accessible. Should select Full only? seems like Cloudflare updated their dashboard.

 

Solved thanks!
Maybe Wordpress install doesn't like the autogenerated pw. Did a password reset via command below!

Code:

vhostname=mydomain.com
/usr/local/nginx/conf/htpasswd.sh create /home/nginx/domains/$vhostname/htpasswd_wplogin USERNAME PASSWORD

where USERNAME - is your new desired username and PASSWORD - is your new desired password