When attempting to load in Forge, the mod calls for a different version of Flywheel than what is installed. Here are the crash logs, just moments apart, with the flywheel versions called for. Other than changing the version of Flywheel, there were no other changes.

crash-2021-08-29_10.23.02-fml.txt
crash-2021-08-29_10.26.43-fml.txt