Heeey, with the latest version I seem to be getting the following errors in my console from time to time:
https://gyazo.com/a94549ac2a0d7a50eb49efd4234a0d9c
This seems to be related to the Carpenter blocks.
Running Tekkit Legends modpack on Thermos latest release.

Added a new warning rather than throwing an exception. 3.3.8_dev_r5 removed a packet type, which is likely the cause of this issue.