Version Information

Forge version: 1.16.1, forge-32.0.98
Botania version: Botania-1.16-398

Further Information

Link to crash log: (https://pastebin.com/pcrdGuj1)
Steps to reproduce:

1. Create Garden of Glass world
2. Hold shift and dig for pebbles
3. Crash

What I expected to happen: Acquire pebbles

What happened instead: No pebbles, just crash

Apologies if bad bug report, only done one or two before

working fine here. Did you download the new version of GoG for 1.16?

Nope, Twitch auto-downloaded an older version, works fine, sorry about that :x