The customer is getting the following failure when trying to run a task, like an imaging task, on a client machine:
An unknown exception was thrown on server side.
System.Net.WebException: The underlying connection was closed: An exception error occurred on a receive. --> System.ComponentModel.Win32Exception: The client and server cannot communicate, because they do not possess a common algorithm.
ITMS 8.5, 8.6
Deployment Solution 8.5, 8.6
TLS version mismatch. This error "The client and server cannot communicate, because they do not possess a common algorithm" usually refers to a TLS mismatch between the SMP, Task Server, and possibly the client machine(s). Sometimes it could be caused if FIPS is in use.
Usually, if TLS 1.2 is the only version to use all around, Microsoft suggests making sure the following regkeys are set this way:
"The client and server cannot communicate. TLS version mismatch"
After moving from HTTP to HTTPS - no Site Server Task Servers are able to register