Error - #<NoMethodError: undefined method `empty?' for 200:Integer>

[jeantristan]

I was using this fantastic gem during several months.
It just stop working. Now I have the following error:

Sending HTTP get https://www.googleapis.com/drive/v3/files/1g6rlRbR2bfZu8UH9GJ5gFWoUZqZRgLJCIYTEV0ffvWg?fields=%2A&supportsAllDrives=true
200
Caught error undefined method `empty?' for 200:Integer
Error - #<NoMethodError: undefined method `empty?' for 200:Integer>

Traceback (most recent call last):
        2: from (irb):7
        1: from (irb):8:in `rescue in irb_binding'
NoMethodError (undefined method `empty?' for 200:Integer)

To reproduce:

require "google_drive"
@session = GoogleDrive::Session.from_service_account_key("google_service_account_info.json")
 sheet_key = ENV["EXPORT_GSHEET_ALL_LOTS_ID"]
@ws = @session.spreadsheet_by_key(sheet_key).worksheets[0]