System.Exception: Hash function returned wrong hash

[AmyMoriyama]

libhash.so is not available. Checking user submitted hashes disabled:
-> System.Exception: Hash function returned wrong hash

So, I compiled the hash_cn with make as per the readme and no errors, but when running the server, I get the above error and I am out of ideas on what to do.

https://github.com/notgiven688/webminerpool#hash_cn