400 Expected HTTP Error: resulted in a `400 Bad Request` response

Check all the parameters. It should work as such.

I have checked that it is working fine on local system and if used the image below the size 500 bytes it is working fine but with image more than 500 bytes it give 400 error.
Thanks

Are you getting similar kind of issue: https://community.ringcentral.com/questions/9269/400-bad-request-on-send-mms.html

Seems incase of mms similar issue happening