416.838 Script @HelicopterRevival/logic/heliBase.lua:927: 97800000
420.004 Warning WriteFileGuard.cpp:51: Writing /mnt/Juegos1/Factorio/game/saves/chutakai33.zip failed; previous version (if any) should still be available
420.007 Error ParallelScenarioSaver.cpp:158: Saving scenario failed: The mod HelicopterRevival (0.3.0) caused a non-recoverable error.
Please report this error to the mod author.

Error while running event HelicopterRevival::on_save()
Cannot serialise lua functions
431.652 Info AppManager.cpp:342: Deleting active scenario.
432.934 Quitting: user-quit.
433.080 Goodbye

version 2.0.29

Same here, seems like it's happening when flying on Vulcanus during save.

73640.516 Info AppManager.cpp:313: Saving to _autosave1 (blocking).
73641.536 Warning WriteFileGuard.cpp:51: Writing /opt/factorio/saves/_autosave1.zip failed; previous version (if any) should still be available
73641.542 Error ParallelScenarioSaver.cpp:158: Saving scenario failed: The mod HelicopterRevival (0.3.0) caused a non-recoverable error.
Please report this error to the mod author.

Error while running event HelicopterRevival::on_save()
Cannot serialise lua functions
73641.553 Error Util.cpp:81: Attempting to create notice box in headless mode. Message: 'Cannot save map: The mod HelicopterRevival (0.3.0) caused a non-recoverable error.
Please report this error to the mod author.

Error while running event HelicopterRevival::on_save()
Cannot serialise lua functions'
73641.553 Info GlobalContext.cpp:760: Deleting active scenario.
73642.285 Info ServerMultiplayerManager.cpp:119: Disconnecting multiplayer connection.
73642.285 Info ServerMultiplayerManager.cpp:806: updateTick(18446744073709551615) changing state from(InGame) to(DisconnectingScheduled)
73642.542 Info ServerMultiplayerManager.cpp:146: Quitting multiplayer connection.
73642.543 Info ServerMultiplayerManager.cpp:806: updateTick(18446744073709551615) changing state from(DisconnectingScheduled) to(Closed)
73642.543 Info ServerMultiplayerManager.cpp:166: Deleting active scenario (global = true).

version 2.0.28

Same error here:

Saving scenario failed: The mod HelicopterRevival (0.3.0) caused a non-recoverable error.
Please report this error to the mod author.

Error while running event HelicopterRevival::on_save()
Cannot serialise lua functions