[ixpmanager] 500 on password reset

[Moritz Frenzel]

Hi,

I'm working on a fresh install of ixpmanager 5.4.1 and am facing
issues with the password reset and user creation process.

IXPManager sends a mail to the new user with the password reset link:
https://<ixpmanager>/password/reset/<token>?username=foo

And then throws a 500 with a RuntimeException "username is not
defined." at /srv/ixpmanager/vendor/foil/foil/src/Extensions/Helpers.php:343

Stacktrace: https://pastebin.com/itt60Tjw
System: Debian 10, php7.3-fpm on nginx

Let me know if you need any further information.

Thanks in advance

- Moritz