Octoprint Z-probe not homing

[kolakidd]

Hi, I'm trying to setup Octoprint with my Printrbot Simple Metal. Everything is working, except that I cannot get the bed-levelling to detect. It does work in Cura, and when I

This is the response I get on the M119 code:
Send: M119
Recv: Reporting endstop status
Recv: x_min: TRIGGERED
Recv: y_max: TRIGGERED
Recv: z_min: open
Recv: ok

G28 gives me this result, but the Z probe is 2cm above the bed:
Send: G28 X0 Y0 Z0
Recv: echo:ZProbe Outside Bed
Recv: ok

This is my machine firmware:
Send: M115
Recv: FIRMWARE_NAME: Marlin V1 FIRMWARE_URL: PROTOCOL_VERSION: 1.0 MACHINE_TYPE: Printrbot Simple EXTRUDER_COUNT: 1

Any help would be greatly appreciated!