It looks like there’s a lot going on in your system, and it is really hard to tell where all of your connections are going from the pictures. You mentioned that the VM and 3V3 pins on the driver are disconnected; did you have either of those connected to something when you tried to power the system? if so, where did you have them connected?
Also, your 36V power supply is higher than we recommend using with that G2 High-Power Motor Driver 24v13; as mentioned on the driver’s product page, under normal operating conditions, ripple voltage on the supply line can raise the maximum voltage to more than the average or intended voltage, so a safe maximum voltage is approximately 34V. Additionally, it does not look like you have installed the heavily recommended capacitor across the motor supply and ground. Please note that this capacitor is very important for good performance. More information can be found under the “Using the motor driver” section of that same product page.
If it will not start when the driver is in your system, there might be a short somewhere that is triggering some kind of protection on your supply. Could you try removing the driver from your system checking with a multimeter to see if you can find a short (e.g. between ground and VIN)?
Lastly, could you post close-up pictures of both sides of your driver?