Happened on heavy modded multiplayer game. I was client, host was unaffected. All clients desynced and disconnected 20-30 minutes prior, unknown if it's related.
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The mod No More Gambling (1.2.6) caused a non-recoverable error.
Please report this error to the mod author.

Error while running event no-more-gambling::on_nth_tick(30)
LuaChunkIterator API call when LuaChunkIterator was invalid.
stack traceback:
[C]: in function 'chunk_iterator'
no-more-gambling/control.lua:364: in function 'scan_next_inactive_chunk'
no-more-gambling/control.lua:380: in function 'scan_next_inactive_chunks'
no-more-gambling/control.lua:403: in function <no-more-gambling/control.lua:403>
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