Classic ASP w/ MySQL and ODBC 5.1 - including web.config file

I have been out of the programming game for a bit, as I used to specialize in Classic ASP before ASP.Net became what it is today, let alone C#. However, my site is hosted on a Windows Server, V8.5 and uses ASP.Net configurations, which I am somewhat ignorant to and I need assistance to enable/manipulate Classic ASP using the Web.Config file. I have read because of the ASP.Net framework version 4.62, I should be using connectionStrings instead of appSettings which I have done, but I still get a Server 500 error

/QUOTE:
Internal Server Error

The server encountered an internal error or misconfiguration and was unable to complete your request.
Please contact the server administrator to inform of the time the error occurred and of anything you might have done that may have caused the error.

More information about this error may be available in the server error log.
/Q

Can someone please assist in helping me find a solution?

NOTE: I am using Classic ASP and MySQL DB with ODBC Connection 5.1 (used to be 3.5 Lol), as this is what I used quite some time ago.

AND YES, I know I am way out of date, but need to work with the knowledge base I am familiar with, thank you!