When users attempt to log on to Receiver for Web, they receive the following error:
Http/1.1 Gateway Timeout
What could be causing this error?

A.
Port 2598 is blocked by a firewall.
B.
The configured AppController is NOT reachable.
C.
The SSL certificate installed on the StoreFront server has expired.
D.
Antivirus software on client devices is blocking connections to the StoreFront server.
Explanation:
B
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Correct answer is B
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С
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