We have received several reports about that issue. It seems that some internal server that the zm miner uses has an invalid SSL certificate causing the miner to crash during startup. This issue is not caused by the mining pool but directly by the miner and thus also can only be resolved by the miner developer. I suggest monitoring the bitcointalk thread for further information [ANN] dstm's ZCash / Equihash Nvidia Miner v0.6.2 (Linux / Windows) and swtich to a different miner until the dev releases a fixed version.