see above. I hold the quill and I hold the paper I right click and then it crashes. it also crashes when I try to pickblock the pattern

https://pastebin.com/9BkPVEuu

For any bug reports please provide the following details as well,

• MC Version: 1.16.5
• C&B Version: 1.0.0
• Do You have Optifine: no

Found it thank you.
Will be awaiting a commit in the next few days.

I have the same bug exactly.
The bug only occurs when I try to quill with the blocks from the older version (C&B 0.3.4). Blocks chiseled with the new version (C&B 1.0.0) works well when quilling and sealing.
Hope that it's helpful

Fixed in the latest beta