Hi everyone, I hope it's okay to re-up an old thread? I wasn't sure my question warranted its own topic

I'm running my own mining pool and I'm trying to mine a coin with sha256d as its algo. I've set the pool difficulty for sha256 in the coin/algo configuration files in my pool to 500000 (the minimum required by NiceHash for sha256 - https://www.nicehash.com/pool-operators). I can get solo miners to connect and mine blocks and they parse the difficulty as being 500000 - https://imgbox.com/E2fIYofp. However, NiceHash pool verificator returns the "pool difficulty too low (provided=16, minimum=500000)" error (https://imgbox.com/uWopLwOz) and miners from NiceHash orders fail to connect to the pool. What could the issue be and how do I fix this?

Thanks in advance!

Sincerely,
newlymintedcryptolover