Hi All,
Unfortunataly I crashed my Spark and It's gimbal is broken. I replaced it and now I'm getting Gimbal overload error on App. Tried multiple things but it's now working.
Any help would be appriciated .

Hello and good day ChinmayJ. I am sorry to know what is happened to your DJI Spark. Since this unfortunate incident happened and a crash happened. I would recommend you contact our DJI support team to start up a ticket for the said drone at https://www.dji.com/support?site=brandsite&from=nav . We have the professional team who would do their best to check and fix the said drone. Again I am sorry for the trouble and thank you for your support.

Hello, I crashed mine too and the same issue occurred saying the gimbal overload, what worked for me was I clicked the red bar on the top of the flight screen and recalibrated it for me. Mine did take about 3 calibrations before success but it did end up working. Hope this can help!

After replacing the gimbal on the spark it needs to be calibrated, this requires DJI's Spark repair software. I have never seen an option to calibrate the gimbal in the app.

Ben Mason Posted at 9-24 00:30
After replacing the gimbal on the spark it needs to be calibrated, this requires DJI's Spark repair software. I have never seen an option to calibrate the gimbal in the app.

Ok, so perhaps this can help?

S-e-ven Posted at 9-24 02:00
Ok, so perhaps this can help?

https://youtu.be/tu2Aq4Vb0W4

Looks like it, it's not the DJI software but it sends the right commands to the drone and that's enough for just calibrating the gimbal. I have heard that the Spark software is out in the public, but i don't share or post links to this kind of stuff.

Ok, there might be a dji forum topic for this, too
;-)

https://forum.dji.com/thread-122720-1-1.html

Google is working well, these days.
With the right search words.