Error: The underlying connection was closed: An unexpected error occurred on a send - in the NetCommunity plugin after turning off TLS 1.0

After disabling TLS 1.0 and attempting to access the NetCommunity plugin in either The Raiser's Edge or The Education Edge, the following error is received:

The underlying connection was closed: An unexpected error occurred on a send
We are currently evaluating this issue and will update this article when we have more information.
 

Environment

 Blackbaud NetCommunity
 7.1
 7.1 Service Pack 2 (7.1.186.0)

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