This mod throws a warning in the game's output log upon the game starting up, which is as follows:
The mod "shulkerboxtooltip" contains invalid entries in its mod json:
- Unsupported root entry "licence" at line 8 column 12
This appears to be due to "license" being misspelled as "licence" in your fabric.mod.json. This should be a simple fix that will help keep the log clear.~

Oops! I fixed this in the 1.17 branch, but forgot to apply this to the 1.16 branch