In my code, for an unknown reason one of the features (in a FC with a few thousand conflict locations and their dates) is causing a problem leading to this error: FeatureCollection (Error) Error in map(ID=00000000000000001ae5): Number.subtract: Parameter 'left' is required. When I print it, it does't seem to be different.
I know that it cannot be a problem with the FC because the same FC works together with an other Image Collection in a script doing the same thing.
Also when I limit the FC to exclude number 137 (ID=00000000000000001ae5) then the script works.
var conflicts = ee.FeatureCollection('users/welp1992/Conflicts25_Date').limit(136)
And this the Code: https://code.earthengine.google.com/?accept_repo=users/welp1992/Master