https://gist.github.com/Febilian/4368f54b8a9d69bd02738bb4f3e027c7

This happened on a dedicated server, and as soon as it happened, the server just consistently crashed on startup until Wings was removed.

Thanks for the report! You'll want to report this to Embers Rekindled as they are performing an invalid operation by offering an empty item stack as an ingredient to repair, a situation that never occurs in vanilla code.

I would also suggest they reorder this expression such that the blacklist check guards the isRepairable call so it can be functional for temporary error fixes such for this.

I however will adjust my ore dictionary logic as I should be handling arbitrary empty stacks.

Wings 1.1.2 is now out with the patch.