Error when using TESTNET

[webhive]

With BINANCE_TEST_NET_ENABLE=true

On this test code

require 'rubygems'
require 'bundler/setup'
require 'binance-ruby'

Binance::Api.all_coins_info!

My Gemfile

source 'https://rubygems.org'
gem 'binance-ruby'

I am getting the following errors:

Traceback (most recent call last):
        5: from test.rb:10:in `<main>'
        4: from /Users/roman/Projects/binance/ruby/vendor/gems/ruby/2.7.0/gems/binance-ruby-1.3.6/lib/binance/api.rb:7:in `all_coins_info!'
        3: from /Users/roman/Projects/binance/ruby/vendor/gems/ruby/2.7.0/gems/binance-ruby-1.3.6/lib/binance/api/request.rb:31:in `send!'
        2: from /Users/roman/Projects/binance/ruby/vendor/gems/ruby/2.7.0/gems/binance-ruby-1.3.6/lib/binance/api/request.rb:45:in `process!'
        1: from /Users/roman/.asdf/installs/ruby/2.7.1/lib/ruby/2.7.0/json/common.rb:156:in `parse'
/Users/roman/.asdf/installs/ruby/2.7.1/lib/ruby/2.7.0/json/common.rb:156:in `parse': 783: unexpected token at '' (JSON::ParserError)
        4: from test.rb:10:in `<main>'
        3: from /Users/roman/Projects/binance/ruby/vendor/gems/ruby/2.7.0/gems/binance-ruby-1.3.6/lib/binance/api.rb:7:in `all_coins_info!'
        2: from /Users/roman/Projects/binance/ruby/vendor/gems/ruby/2.7.0/gems/binance-ruby-1.3.6/lib/binance/api/request.rb:31:in `send!'
        1: from /Users/roman/Projects/binance/ruby/vendor/gems/ruby/2.7.0/gems/binance-ruby-1.3.6/lib/binance/api/request.rb:44:in `process!'
/Users/roman/Projects/binance/ruby/vendor/gems/ruby/2.7.0/gems/binance-ruby-1.3.6/lib/binance/api/request.rb:48:in `rescue in process!': @783: unexpected token at '' 783: unexpected token at '' (Binance::Api::Error)

It happens on exactly this method (all_coins_info!). Other methods I tested was working fine.