I think the pool just crashed, both my S9 and S7 are reporting it as DEAD.
7/18/2018 23:13 EST - Pool is alive again
someone is running 450th at it.
and finally a fix!
2018-07-18: NiceHash or high difficulty miners can use port 3334 instead of 3333. Starting difficulty on that port is 1,000,000.
I will point 1 ph asap.