# Exponent::Push::UnknownError: Unknown error format: {}

1. SDK Version: 38
2. Platforms(Android/iOS):

Below error log is retrieved from sentry log. but i am unable to figure out what’s the causes and how to fix it.

``````Sentry Issue:

Exponent::Push::UnknownError: Unknown error format: {}
app/workers/expo_worker.rb:15:in `perform'
expo.client.publish(messages)
...
(33 additional frame(s) were not displayed)

Unknown error format: {}
``````
``![Screenshot_expo|690x388](upload://wHeBaDkwwxd40mnrsSk8Pz3olI2.png)``

Hey @026binit, the image you meant to provide is broken. Can you fix the formatting so that we can see it?

Cheers,