remote: Traceback (most recent call last):        
remote:   File "/usr/lib/python2.7/site-packages/pagure/hooks/files/git_multimail_upstream.py", line 2650, in <module>        
remote:     main(sys.argv[1:])        
remote:   File "/usr/lib/python2.7/site-packages/pagure/hooks/files/git_multimail_upstream.py", line 2621, in main        
remote:     recipients=options.recipients,        
remote:   File "/usr/lib/python2.7/site-packages/pagure/hooks/files/git_multimail_upstream.py", line 2567, in choose_environment        
remote:     "EffectiveEnvironment", tuple(environment_mixins) + (Environment,), {}        
remote: TypeError: type() argument 1 must be string, not unicode        
remote: Traceback (most recent call last):        
remote:   File "/usr/lib/python2.7/site-packages/pagure/hooks/__init__.py", line 373, in run_project_hooks        
remote:     changes=changes,        
remote:   File "/usr/lib/python2.7/site-packages/pagure/hooks/__init__.py", line 111, in runhook        
remote:     changes=changes,        
remote:   File "/usr/lib/python2.7/site-packages/pagure/hooks/mail.py", line 113, in post_receive        
remote:     raise Exception("git_multimail failed")        
remote: Exception: git_multimail failed