game crashes when trying to load custom map

[steady heart]

i'm trying to test my (probably terrible) b-side for prologue, but it just crashes.
i've removed every entity that doesn't come with celeste and i've placed a spawn point in every room, so with me being completely new to mapping i have no idea what's wrong.
if necessary, i can attach the map, but i'll just attach the log for now.

[steady pagoda]

i have no idea what that error means
having the map would be useful

[steady heart]

alright

[steady pagoda]

try removing the xml paths in metadata