I think I have found the cause, but not sure how to remedy it. Both our main and redundant gateways are on servers with two networks, one that is a business network, accessible to anyone in the company on the network, and one that is connected to plant equipment (PLCs, etc.), that is accessible to only a few people.
If I try to open the designer or a client when I am connected to both networks, it opens with no problem. If I disconnect from the plant network, I get the connecting window for a few seconds, then it disappears. The log then lists the following error that indicates it can’t find the backup gateway on the plant network:
A Communication error occurred when attempted to communicate with the backup gateway ‘http://#.#.#.#:8088’. Launching will continue, but no certificate checking can be performed while it is down
JCaudle and MQuinn work at the same company as me, but they don’t have access to the plant network. I have tried this on other clients that do not have plant network access, with the same result. This was not an issue prior to 8.0.13.