Redmine not working for few projects

I am getting [ActiveJob] [MessengerDeliverJob] [6bac4db3-8e31-48d0-af34-06c13a01aa9e] #<Net::HTTPBadRequest 400 Bad Request readbody=true>
on some of my projects on redmine 4.2.2 using the same webhook link on rocketchat. 

I am able to send the curl containing JSON directly from terminal by posting a curl to webhook URL.

Please could you help me with this. 


