# Authorization Extension not working **URL:** \ **Category:** Get Help\ **Tags:** not-working, extension, authorization-extens, authorization\ **Created:** [November 22, 2017, 11:50pm UTC](https://community.auth0.com/t/authorization-extension-not-working/8808 "2017-11-22T23:50:49Z")\ **Posts on this page:** 4\ **Page:** 1
**Author:** ![mgr](https://upload.wikimedia.org/wikipedia/commons/thumb/7/7c/User_font_awesome.svg/768px-User_font_awesome.svg.png) [@mgr](https://community.auth0.com/u/mgr)\ **Post date:** [November 22, 2017, 11:50pm UTC](https://community.auth0.com/t/authorization-extension-not-working/8808/1 "2017-11-22T23:50:49Z")
I receive the following error: “Authorization Extension: Cannot read property ‘filter’ of undefined” ---
**Author:** ![jmangelo](https://sea1.discourse-cdn.com/auth0/user_avatar/community.auth0.com/jmangelo/32/7923_2.png) [@jmangelo](https://community.auth0.com/u/jmangelo)\ **Post date:** [November 23, 2017, 12:29am UTC](https://community.auth0.com/t/authorization-extension-not-working/8808/2 "2017-11-23T00:29:33Z")
Thanks for reporting this; we have received some other reports of similar problems and as an initial response reverted some changes that were made recently to the extension. The current expectation is that with the rollback the error itself should be addressed so you should see the situation going back to stable shortly. If you don’t see improvements over the next minutes then do let us know. ---
**Author:** ![luije87](https://sea1.discourse-cdn.com/auth0/user_avatar/community.auth0.com/luije87/32/28155_2.png) [@luije87](https://community.auth0.com/u/luije87)\ **Post date:** [December 23, 2017, 4:26am UTC](https://community.auth0.com/t/authorization-extension-not-working/8808/3 "2017-12-23T04:26:03Z")
Same problem over here. See attachment please. Thank you!![alt text][1] ---
**Author:** ![system](https://global.discourse-cdn.com/auth0/original/3X/b/5/b560f266932fcce5d57f09a6595bd50518cae3f3.jpeg) [@system](https://community.auth0.com/u/system)\ **Post date:** [March 2, 2018, 5:57am UTC](https://community.auth0.com/t/authorization-extension-not-working/8808/4 "2018-03-02T05:57:31Z")