In Firefox:
Your connection is not secure
The owner of https://gl.wikimerda.miraheze.org has configured their web site improperly. To protect your information from being stolen, Firefox has not connected to this web site.
This site uses HTTP Strict Transport Security (HSTS) to specify that Firefox only connect to it securely. As a result, it is not possible to add an exception for this certificate.
In Chromium:
Your connection is not private
Attackers might be trying to steal your information from https://gl.wikimerda.miraheze.org (for example, passwords, messages or credit cards). Learn more
NET::ERR_CERT_COMMON_NAME_INVALID
gl.wikimerda.miraheze.org normally uses encryption to protect your information. When Chromium tried to connect to gl.wikimerda.miraheze.org this time, the website sent back unusual and incorrect credentials. This may happen when an attacker is trying to pretend to be https://gl.wikimerda.miraheze.org, or a Wi-Fi sign-in screen has interrupted the connection. Your information is still secure because Chromium stopped the connection before any data was exchanged.
You cannot visit https://gl.wikimerda.miraheze.org right now because the website uses HSTS. Network errors and attacks are usually temporary, so this page will probably work later.
LOL, are you d00dz trying to H3X0R my cookies? :)