Switch Registration Times Out

Hello all -I have a pair of brand new SOPHOS C12ATCHUS CS110-24 24 Port switches. In my several attempts to register them with SOPHOS Central, each has timed out. I am unable to find any troubleshooting documentation that has been helpful.
Both are straight out of the box and are connected to the internet gateway.

Any recommendations would be greatly appreciated.

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[edited by: Erick Jan at 5:49 AM (GMT -8) on 11 Jan 2024]