Looks like something up with Tribus consistently for the past half hour to hour:

*** ccminer 2.2.4 for nVidia GPUs by tpruvot@github ***
    Built with VC++ 2013 and nVidia CUDA SDK 9.0 64-bits

  Originally based on Christian Buchner and Christian H. project
  Include some kernels from alexis78, djm34, djEzo, tsiv and krnlx.

BTC donation address: 1AJdfCpLWPNoAMDfHF1wD5y8VgKSSTHxPo (tpruvot)

[2018-03-18 20:37:38] Starting on stratum+tcp://mine.zergpool.com:8533
[2018-03-18 20:37:38] NVML GPU monitoring enabled.
[2018-03-18 20:37:38] NVAPI GPU monitoring enabled.
[2018-03-18 20:37:38] 2 miner threads started, using 'tribus' algorithm.
[2018-03-18 20:37:39] API open to the network in read-only mode on port 4028
[2018-03-18 20:37:41] ...retry after 30 seconds
[2018-03-18 20:38:15] ...retry after 30 seconds
[2018-03-18 20:38:48] ...retry after 30 seconds
[2018-03-18 20:39:21] ...retry after 30 seconds

Seeing this on multiple systems. Anyone else having this issue?