Placed first windmill over a ghost of it and game immediately crashed. Reproduced when attempting to place at any spot. Confirmed again with only this mod and base game 2.1.9, crash on placing windmill.

The mod Wind Turbines (relaunched) (2.3.0) caused a non-recoverable error.
Please report this error to the mod author.

Error while running event Wind-Turbines-relaunched::on_built_entity (ID 6)
LuaEntity::minable is read only.
stack traceback:
[C]: in function 'newindex'
__Wind-Turbines-relaunched/scripts/control.lua:222: in function 'handler'
core/lualib/event_handler.lua:72: in function <core/lualib/event_handler.lua:70>

Thx for reporting that bug. Fix is commited, but unfortunately there seems to be some outage on github which prevents publish - see https://imgur.com/a/PowaPGD

I'll be back as soon as the publish succeeds

Edit: github was faster than I 😆 - release build is finished and V 2.3.1 with the fix is online

Thank you for such a quick response! I will make sure to give you props to the viewers tomorrow