This should be a bug in the gem, refer to https://github.com/rubygems/rubygems/issues/1420
There are two solutions. The first is to manually add this method. Of course, this is not recommended. The second one is to upgrade the gem, http://gems.ruby-china.org/ There is a method to upgrade the gem, but it seems to have to bypass the wall
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method_missing: ‘undefined method ‘this’’ Find it yourself in your error log
This should be a bug in the gem, refer to https://github.com/rubygems/rubygems/issues/1420
There are two solutions. The first is to manually add this method. Of course, this is not recommended.
The second one is to upgrade the gem, http://gems.ruby-china.org/ There is a method to upgrade the gem, but it seems to have to bypass the wall