I lose my progress everytime I load the game. Gold's gone and quest starts from the beginning again. But the buildings and crops is still there. Overall this mod is freaking great but the bug is keeping me from playing mod.

Thanks for your report!
You have to give us some more information than that. For example what Harvest Festival version etc.? Everything you think would be relevant.

from version 1.10.2-0.6.0-210 to 1.10.2-0.6.0-218.

Alright, that's a start.
What operative system are you using?
Also would you happen to be logging in to Minecraft in offline-mode somehow?

That is your problem then. We don't support fake Minecraft accounts.

I'm using Windows 10 and yes I logging in to mc offline mode