# Error while connecting to Facebook messenger

**URL:** <https://forum.rasa.com/t/error-while-connecting-to-facebook-messenger/14939>\
**Category:** Rasa Open Source\
**Created:** [August 28, 2019, 1:41pm UTC](https://forum.rasa.com/t/error-while-connecting-to-facebook-messenger/14939 "2019-08-28T13:41:00Z")\
**Posts on this page:** 1\
**Showing post:** 3

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**Author:** ![PureLogics](https://avatars.discourse-cdn.com/v4/letter/p/cdc98d/32.png) [@PureLogics](https://forum.rasa.com/u/PureLogics)\
**Post date:** [August 30, 2019, 3:20pm UTC](https://forum.rasa.com/t/error-while-connecting-to-facebook-messenger/14939/3 "2019-08-30T15:20:39Z")

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Hi @amn41 , I point a domain name and encrypted ssl certificates and when i enter callback url and verify token while creating FB web-hook as shown in screen shot below:

 ![Capture](https://europe1.discourse-cdn.com/flex013/uploads/rasa/original/2X/0/0e32bfcdd85802531f09f6009f8b283be4714457.png)

It gives this error:

```
The URL couldn't be validated. Callback verification failed with the following errors: curl_errno = 60; curl_error = SSL certificate problem: unable to get local issuer certificate; HTTP Status Code = 200; HTTP Message = Connection established

```

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