https://pastebin.com/c16auYWr
Playing around with alpha builds of TFC since September of last year without seeing any ore all this time seems to confirm that ores aren't spawning. I thought they simply weren't implemented yet, but after noticing those error messages in the console, maybe they are implemented, but not quite properly? I'm really not sure

What version are you using?
They certainly do spawn in my dev environment and its a fresh copy from last night.

v0.2.1.35. I've also used WorldEdit to remove a lot of stone blocks on several occasions, the most recent being a few minutes ago, and still haven't seen any ores before:
https://i.imgur.com/64lOo5I.jpg
https://i.imgur.com/htUbQKq.jpg
If it helps, here's a latest.txt log file: https://pastebin.com/q3FrRTb8

Can you repeat the issue without all the extra mods?
There is a handy command for checking built into TFC /stripworld <radius> -> [DANGER] Strips all stone variant blocks + water.

Those console warnings mean your json ore configuration is bad. Try deleting the ore gen json and reloading TFC. If the default config is bad, that is a separate issue.

After deleting that file from last September, restarting the game, and generating a new world, ores are spawning now!
No new oregen file was generated in place of the one I deleted. Is that a problem, or is that fine?

That is a different bug. It seems if a config file isn't found, it just reads the default one instead of creating a default one.