"no implicit conversion of Array into String" with client.auth_test

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Assessment

Difficulty
4/5
Estimated time
3-5 days
Newbie friendliness
25/100
Issue type
Bug
Clarity
Needs clarification
Activity status
Stale
Tech stack
ruby
Domain
api, backend

Research direction

Start with the README instructions and the Slack.configure block shown in the report, then trace the client.auth_test call in the Ruby Slack Web API client. Reproduce the Heroku deployment error while comparing it with the successful client.files_upload call. Done means identifying the cause of the Array-to-String error and documenting or fixing the affected request path.

Written by the indexing model from the issue text.

Description

bug? question

Hi,

I followed the instructions in the Readme but it's throwing an error at some point. My code is deployed on Heroku. Here's the piece of code in question:

Slack.configure do |config|
    config.token = ENV['SLACK_API_TOKEN']
end
    client = Slack::Web::Client.new
client.auth_test  #Error happens at this line.

The error is (displayed on Slack):

<DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.0//EN">
<HTML>
 <HEAD><TITLE>Internal Server Error</TITLE></HEAD>
 <BODY>
   <H1>Internal Server Error</H1>
   no implicit conversion of Array into String
   <HR>
   <ADDRESS>
    WEBrick/1.3.1 (Ruby/2.2.4/2015-12-16) at
    [myapp].herokuapp.com:443
   </ADDRESS>
 </BODY>
</HTML>

Somehow, I can still call client.files_upload() after auth_test with no problem (token is correct) but I still get the error above displayed on Slack. What's wrong?
Thanks!

Dominant language
Ruby
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Merged PRs (30d)
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