Status: New
Owner: ----
Labels: Type-Defect Priority-Medium

New issue 3932 by ValueError: Extension "__builtin__.NoneType" must be of type: "markdown.Extension".

What version are you running?
Review Board 2.5 beta 1

What's the URL of the page containing the problem?
On our local reviewboard while opening

What steps will reproduce the problem?
1. Publish a review
2. Other user added some comments

What is the expected output? What do you see instead?
Expected to see the review. Instead I see 'Something broke! (Error 500)' and receive the attached error report.

What operating system are you using? What browser?
martijn@virtualix ~ $ lsb_release -a
No LSB modules are available.
Distributor ID: Ubuntu
Description:    Ubuntu 12.04.5 LTS
Release:        12.04
Codename:       precise

Google chrome Version 45.0.2454.7 dev (64-bit)

Please provide any additional information below.

We recently upgraded reviewboard from 2.x to 2.5b1

        review_error.txt  13.0 KB

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