When I tried to load the game with the core mod, the base mod, this mod, the full Bob and Py suites, I get an error message that has something to do with tin ore.

What factorio version are you running? Because some Angels/Bob mods need a newer factorio version now. Please try using factorio 0.18.29 to make sure all mods can be loaded.

I used 18.29.

Can you give a minimal mod list that reproduces the issue?

Bob’s functions library
Bob’s metals, chemicals and intermediates
Bob’s ores
Bob’s power
Factorio standard library
Pyanodons coal processing+graphics
Pyanodons industry
Pyanodons raw ores+graphics
Pycoal touched by an angel (dark’s version)
Note that removing Bob’s power causes a different error.

Thank you, I pushed an update that fixes this issue.