Redmine

Hey guys,

A few weeks ago I installed redmine on Ubuntu 14.04. Currently we have problems with CSV export and filtering of tickets. We get in the browser the error message 500. However, if I remove it from the link utf8 it works fine

https://redmine.domain.com/projects/project1/issues.csv?utf8=%E2%9C%93&columns= -> isn't working
https://redmine.domain.com/projects/project1/issues.csv?columns= -> works

Environment:
  Redmine version                3.0.3.stable
  Ruby version                   2.2.1-p85 (2015-02-26) [x86_64-linux]
  Rails version                  4.2.1
  Environment                    production
  Database adapter               Mysql2
SCM:
  Filesystem                     
Redmine plugins:
  no plugin installed

MariaDB [(none)]> show global variables like 'char%';
+--------------------------+----------------------------+
| Variable_name            | Value                      |
+--------------------------+----------------------------+
| character_set_client     | utf8                       |
| character_set_connection | utf8                       |
| character_set_database   | utf8                       |
| character_set_filesystem | binary                     |
| character_set_results    | utf8                       |
| character_set_server     | utf8                       |
| character_set_system     | utf8                       |
| character_sets_dir       | /usr/share/mysql/charsets/ |
+--------------------------+----------------------------+
8 rows in set (0.00 sec)