Hi,
I am working with a service that gives me this kind of wrongly formatted error messages : not readable
Am I doing something wrong somewhere? Or is this the service provider’s fault? (or Bubble?)
Best to you
Usually a bad request means that you are sending something to an API in the wrong format or there are wrong characters included. Check the values that you are sending to make sure they are correct. Share a screenshot and maybe we can assist. 
To clarify, my question here is about the error message being wrongly formatted and displayed and unreadable.
Ohhh. The logs have always been pretty lame like that. Not sure if Bubble will fix that if you report it. 