Login crashes the application

On a new install of Komikku the app crashes when login to a server. This doesn't happen if I'm already logged in to an other server. It doesn't happen when first trying to login with no username and password filled in. I tried to login on the following servers with same result:

• crunchyroll
• yieha
• izneo

DB version 5
Traceback (most recent call last):
  File "/app/lib/python3.7/site-packages/komikku/settings_dialog.py", line 388, in on_account_stored
    server = server_class(username=login, password=password)
  File "/app/lib/python3.7/site-packages/komikku/servers/crunchyroll.py", line 45, in __init__
    self.init(username, password)
  File "/app/lib/python3.7/site-packages/komikku/servers/__init__.py", line 93, in init
    self.clear_session()
  File "/app/lib/python3.7/site-packages/komikku/servers/__init__.py", line 147, in clear_session
    del Server.__sessions[self.id]
KeyError: 'crunchyroll'