Calling directly /archive/123 gives 500 Internal Server Error

[Strubbl]

Issue details

If i call directly the URL (without any referer or the like) in my browser, e.g. https://wallabag.domain.de/archive/832
I get the error message in the browser:

Oops! An Error Occurred
The server returned a "500 Internal Server Error".
Something is broken. Please let us know what you were doing when this error occurred. We will fix it as soon as possible. Sorry for any inconvenience caused.

The log file of wallabag says:

[2016-04-14 21:36:36] request.INFO: Matched route "archive_entry". {"route_parameters":{"_controller":"Wallabag\\CoreBundle\\Controller\\EntryController::toggleArchiveAction","id":"832","_route":"archive_entry"},"request_uri":"https://wallabag.domain.de/archive/832"} []
[2016-04-14 21:36:36] security.DEBUG: Read existing security token from the session. {"key":"_security_secured_area"} []
[2016-04-14 21:36:36] security.DEBUG: User was reloaded from a user provider. {"username":"strubbl","provider":"Symfony\\Bridge\\Doctrine\\Security\\User\\EntityUserProvider"} []
[2016-04-14 21:36:37] request.CRITICAL: Uncaught PHP Exception InvalidArgumentException: "Cannot redirect to an empty URL." at /home/strubbl/git/wallabag/vendor/symfony/symfony/src/Symfony/Component/HttpFoundation/RedirectResponse.php line 76 {"exception":"[object] (InvalidArgumentException(code: 0): Cannot redirect to an empty URL. at /home/strubbl/git/wallabag/vendor/symfony/symfony/src/Symfony/Component/HttpFoundation/RedirectResponse.php:76)"} []
[2016-04-14 21:36:37] security.DEBUG: Stored the security token in the session. {"key":"_security_secured_area"} []

In the end, my article indeed gets archived, but i see this error message. Same with star and delete (and maybe some other function i don't know of).

PS: I found this bug during Android app development, because the app directly calls this URL and compares the response code to 200.

Environment

• wallabag version (or git revision) that exhibits the issue: 2.0.0
• How did you install wallabag? Via git clone
• Last wallabag version that did not exhibit the issue (if applicable): -
• php version: PHP 5.6.19-0+deb8u1
• OS: Debian
• type of hosting (shared or dedicated): dedicated
• which storage system you choose at install (SQLite, MySQL/MariaDB or PostgreSQL): mysql

Steps to reproduce/test case

1. open browser
2. enter url https://wallabag.domain.de/archive/832 (with valid article id of course)