Hi, everyone.
This issue is most likely due to 1 or more package misalignments. Specifically, the library is using UiPath.System.Activities 22.4.5, but the process that is using that library is on 22.10.3. Furthermore, our Studio is version 22.4.
Still working on confirming that this is the issue, but it is more likely than not the cause.
Word for the wise: keep your versions aligned!
UPDATE:
Confirmed that having the 22.10.3 version in the process interfered with the library running 22.4.5. Downgraded everything, and it’s working.