Update of 2.0.2 not possible

Hi I tried to update my current installation (version 2.0.2).
When I click on the update notification icon, I get an HTTP 500 internal server error (this method has worked perfectly for the last updates)
When I try to do the update manually on the console as described here (https://akaunting.com/docs/update) I get the following error:
# php artisan update:all

Command "update:all" is not defined.

Did you mean one of these?
migrate:install
module:install
update
update:finish
update:terminal

Any ideas on where to find additional information for the HTTP 500 (logs) or how to update manually?
Thanks!

UPDATE:
Debug Bar revealed the following two execptions:

(2/2) ErrorException
Missing required parameters for [Route: updates.update] [URI: install/updates/{update}]. (View: /var/www/html/ak/resources/views/install/updates/index.blade.php)

(1/2) UrlGenerationException
Missing required parameters for [Route: updates.update] [URI: install/updates/{update}].

I am experiencing the same problem which produces the same error messages:

(2/2) ErrorException
(1/2) UrlGenerationException

Hello,

Check this out please:

https://akaunting.com/forum/discussion/announcements/akaunting-203-update

Regards

Worked like a charm!
Thanks a lot.