need help with this error

hi, i need help with this error. code and error below

​

problem code (i think):

walls = {}
if gameMap.layers["Walls"] then
for i, obj in pairs(gameMap.layers["Walls"].objects) do
local wall = world:newRectangleCollider(obj.x, obj.y, obj.width, obj.height)
wall:setType('static')
table.insert(walls, Wall)
end
end
end

function love.draw()
gameMap:drawLayer(gameMap.layers["ground"])
gameMap:drawLayer(gameMap.layers["trees"])
gameMap:drawLayer(gameMap.layers["Walls"])

​

error:

Error

​

libraries/windfield/init.lua:745: Box2D assertion failed: area > b2_epsilon

​

​

Traceback

​

[love "callbacks.lua"]:228: in function 'handler'

[C]: in function 'newFixture'

libraries/windfield/init.lua:745: in function 'newRectangleCollider'

main.lua:37: in function 'load'

[love "callbacks.lua"]:136: in function <[love "callbacks.lua"]:135>

[C]: in function 'xpcall'

[C]: in function 'xpcall'