Switchvox - Invalid peer_ssl_cert error when saving Peered Switchvoxes

If you have finished entering the settings for a Peered Switchvox, including having successfully fetched the certificate from the other PBX, but you encounter the following error when saving:
 

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This may be due to using Internet Explorer 11 when saving these settings, as there have been reported occurrences of this particular error when using IE 11.  Please try using Chrome or Firefox as an alternative, and try saving the Peered Switchvox with that browser instead.

For more information about our supported browsers please visit: Switchvox and Digium phones browser support