Http connection error when loading connectors on IB - PT 8.52.02

We are getting the following error:

Cannot establish HTTP connection (158,2842)

Can be caused by any of the following:

1.  Cannot load certificates due to keystore password (not encrypted).

2.  Keystore file not found.

3.  Proxy server not configured

All solutions point to a keystore error so we have followed every step to the letter in the solutions provided and it still doesn't work. Completely at a loss as to what to do next. There are two Gateways: The local one which pings fine and connectors are loaded and then the ELM one which doesn't load for some reason.

Thanks for your input.