Symantec Endpoint Protection cloud (SEP SBE) blocking application from accessing network.
New version of Symantec Endpoint Protection cloud (SEP SBE) has a more strict security posture against applications with a low reputation, and/or not digitally signed.
Add a Program Control exclusion:
Follow this document to add a Program Control allow rule for the application generating the alert:
How to create custom exclusions
To disable low risk notifications (not recommended):
From the backend user interface (UI), set Program Control to allow low risk applications, as well as set the blocking of traffic for malicious applications to High-Certainty Only:
cd \program files\Symantec.Cloud\AntiVirus
Note: These steps will need to be completed on each system that is detecting the application.