To follow-up, I switched more of my rigs to mine on Zergpool earlier today, both with the auto-switch ports as well as individual coins using the MC parameter. I haven't run into any errors mining so far, so you may want to try mining on that pool again to see if you connect this time. The attack on Verge last night caused a lot of issues with a lot of pools, so they have had some issues on the their end. If you see the issue again, please try copy and paste the exact error message so I can better troubleshoot the issue.
Version 1.9.1 fixes the issue with not being able to disable specific algorithms on MiningPoolHub. After you upgrade, you should be able to disable everything but Equihash on that pool if that is still your intent.
Seems like the problem with Zergpool is fixed, but I have something seriously wrong with my setup. On my rig, I can usually make about $10 a day mining just Ravencoin, but with HashAuger, I'm making about $3 day. I have no idea what it could be. I have Blazepool and Zergpool enabled (made $1.50 over night, approx. 12 hours) and all algorithms working. I have price spike limits set at about 2 times average price range for each card, minimum price switch at 15% and pool refresh at 15 minutes. It really is confusing as to why my earnings are so low. I know BTC is down a bit, but it shouldn't affect me that much. Do you have any ideas?