Heidoc is always crashing when I select any of the options: Windows 8.1, Windows 10, Insider Previe. Please help me.

https://www.heidoc.net/joomla/technology-science/microsoft/67-microsoft-windows-and-office-iso-download-tool?start=4

Q: I'm experiencing one of the following symptoms:

• After selecting a software version, everything grays out and freezes.
• I'm receiving the popup message "ERROR. Please check your internet connection."
• I'm receiving an error message in the status bar.

A: This is your local connection issue, and can have a number of root causes:

• You have modified your HOSTS file. Please remove the following two lines.
  0.0.0.0 aa.online-metrix.net
0.0.0.0 c.bing.com
• You have installed software that prevents scripts from modifying secure websites, such as certain adblockers, firewalls, privacy tools or similar security related software.
• You have disabled TLS 1.2 in your internet settings. You can enable it again in the control panel in the Internet Options category.
• In rare cases, starting the tool as administrator can resolve the issue.
• In rare cases, installing the latest Windows updates, or updating Internet Explorer or the .NET framework to the latest version can resolve the issue.

I am experiencing the problem with the blank page. And any thread I find leads back to this post.
It is really nice that there is this FAQ Answers page, but it is useless to me? Am I the only one?
I don't know what HOSTS files are, what TLS 1.2 settings are, or what the lines in red text mean. How I could change these settings or where to find those files. I don't know how to fix the problem in any way with this information.
 

I don't think I am being unreasonable if I say this needs some additional information/context.