Train Valley Origins update version 1.0.28 is now available - restart your game/Steam client to receive:
We've addressed the VALIDATION_ERRORS message while publishing a level to mod.io being not very informative as per https://discord.com/channels/502477324118261780/1528431795433902192
Leaving the Burning trains amount field empty will no longer break your level
We've also addressed the case when a level with burning trains amount exceeding total trains amount will not launch
Please let us know what you think about the update!