First, thanks for the quick update! Much appreciated.

Factorio 2.1.7, tested with and without SA. No other mods and default mod settings.
Steps to reproduce: Start a new game, open Resource Monitor, go to "Other" tab, click "OK" below "Add new site". Click "Select or modify the area of this site" and select a coal field → crash.

  37.870 Error MainLoop.cpp:1475: Exception at tick 1210: The mod Resource Monitor (1.7.0) caused a non-recoverable error.
Please report this error to the mod author.

Error while running event dqol-resource-monitor::on_player_selected_area (ID 58)
__dqol-resource-monitor__/components/ui/ui.lua:87: attempt to call field 'get_mod' (a nil value)
stack traceback:
    __dqol-resource-monitor__/components/ui/ui.lua:87: in function 'route_event'
    __dqol-resource-monitor__/components/ui/ui.lua:136: in function <__dqol-resource-monitor__/components/ui/ui.lua:128>
  40.760 Info AppManager.cpp:363: Deleting active scenario.

Alright, thank you! I think that may even be an issue in 2.0 but no one reported it yet.

Confirming it was a bug in 2.0

I switched from YARM because I discovered this bug (caused by scanning a new site moved with Ore Patch Organiser), saw you were recommended, so did a migration, and discovered the bug was here, too... came here to see if it was known and saw that it has JUST been fixed probably minutes after I downloaded the mod.

Thanks!

Ah that's great, @Jemsterr! I've released a fix for 2.0 as well, just in case you didn't see that. Lots of overhauls aren't updating to 2.1 right away so I thought it useful to have a stable 2.0 version still.

I did see that, grabbed the update as soon as I saw your comment, and confirmed that it was fixed. (Which is why I said "was")

Thanks so much!