Errors accessing the API

[chak]

I am getting a 500 internal server error when trying to access the basic TaskRabbit API through the ruby gem, although I am able to do some API access using curl from the command line.

Here's my config:

Taskrabbit.configure do |config|
config.api_secret = 'XXX'
config.api_key = 'XXX'
config.base_uri = Rails.env.production? ? 'https://www.taskrabbit.com' : 'https://sandbox.taskrabbit.in'
config.endpoint = 'api/v2'
end

API_SECRET and API_KEY correspond to the Application Secret and Application ID obtained from the dev area of TaskRabbit. (I'm assuming Application ID == API Key here. If not, maybe that's the issue, but I don't see where to get the API Key if it's not the App ID.)

Then in rails console, I try this snippet from the documentation:
tr = Taskrabbit::Api.new
tasks = tr.tasks.all

Using the production base uri, I get this error:
Taskrabbit::Error: 412 Precondition Failed
from /Users/dan/.rvm/gems/ruby-1.9.3-p362/gems/taskrabbit-0.1.0/lib/taskrabbit/client.rb:42:in check_response_errors' from /Users/dan/.rvm/gems/ruby-1.9.3-p362/gems/api_smith-1.0.0/lib/api_smith/client.rb:115:inrequest!'
from /Users/dan/.rvm/gems/ruby-1.9.3-p362/gems/api_smith-1.0.0/lib/api_smith/client.rb:40:in get' from /Users/dan/.rvm/gems/ruby-1.9.3-p362/gems/taskrabbit-0.1.0/lib/taskrabbit/api.rb:27:inrequest'
from /Users/dan/.rvm/gems/ruby-1.9.3-p362/gems/taskrabbit-0.1.0/lib/taskrabbit/task.rb:37:in all' from /Users/dan/.rvm/gems/ruby-1.9.3-p362/gems/taskrabbit-0.1.0/lib/taskrabbit/proxy.rb:58:inload_found'
from /Users/dan/.rvm/gems/ruby-1.9.3-p362/gems/taskrabbit-0.1.0/lib/taskrabbit/proxy.rb:46:in proxy_found' from /Users/dan/.rvm/gems/ruby-1.9.3-p362/gems/taskrabbit-0.1.0/lib/taskrabbit/proxy.rb:17:inall'
from (irb):2
from /Users/dan/.rvm/gems/ruby-1.9.3-p362/gems/railties-3.2.11/lib/rails/commands/console.rb:47:in start' from /Users/dan/.rvm/gems/ruby-1.9.3-p362/gems/railties-3.2.11/lib/rails/commands/console.rb:8:instart'
from /Users/dan/.rvm/gems/ruby-1.9.3-p362/gems/railties-3.2.11/lib/rails/commands.rb:41:in <top (required)>' from script/rails:6:inrequire'
from script/rails:6:in `

'

Using the sandbox base uri, I get this error:

Taskrabbit::Error: 500 Internal Server Error
from /Users/dan/.rvm/gems/ruby-1.9.3-p362/gems/taskrabbit-0.1.0/lib/taskrabbit/client.rb:42:in check_response_errors' from /Users/dan/.rvm/gems/ruby-1.9.3-p362/gems/api_smith-1.0.0/lib/api_smith/client.rb:115:inrequest!'
from /Users/dan/.rvm/gems/ruby-1.9.3-p362/gems/api_smith-1.0.0/lib/api_smith/client.rb:40:in get' from /Users/dan/.rvm/gems/ruby-1.9.3-p362/gems/taskrabbit-0.1.0/lib/taskrabbit/api.rb:27:inrequest'
from /Users/dan/.rvm/gems/ruby-1.9.3-p362/gems/taskrabbit-0.1.0/lib/taskrabbit/task.rb:37:in all' from /Users/dan/.rvm/gems/ruby-1.9.3-p362/gems/taskrabbit-0.1.0/lib/taskrabbit/proxy.rb:58:inload_found'
from /Users/dan/.rvm/gems/ruby-1.9.3-p362/gems/taskrabbit-0.1.0/lib/taskrabbit/proxy.rb:46:in proxy_found' from /Users/dan/.rvm/gems/ruby-1.9.3-p362/gems/taskrabbit-0.1.0/lib/taskrabbit/proxy.rb:17:inall'
from (irb):3
from /Users/dan/.rvm/gems/ruby-1.9.3-p362/gems/railties-3.2.11/lib/rails/commands/console.rb:47:in start' from /Users/dan/.rvm/gems/ruby-1.9.3-p362/gems/railties-3.2.11/lib/rails/commands/console.rb:8:instart'
from /Users/dan/.rvm/gems/ruby-1.9.3-p362/gems/railties-3.2.11/lib/rails/commands.rb:41:in <top (required)>' from script/rails:6:inrequire'
from script/rails:6:in `

'

Any ideas?