I was initially facing this issue: (I am locked out of my WordPress site after changing site URL from Http to Https).

I need to access wp-config to implement the given solution and was trying to access it through Plesk (I'm a beginner).

To open Plesk login, I read I need to go to <mysite.xyz>:8443. Since my site is unreachable, it seems, so is Plesk. My site is Windows-hosted, with the hosting set up by my client.

Please help me understand how to reach Plesk or fix my issue.