Fail to start TypeProf for IDE on zsh

[ono-max]

Here is the log:

[vscode] Try to start TypeProf for IDE
[vscode] stderr: /System/Library/Frameworks/Ruby.framework/Versions/2.6/usr/lib/ruby/2.6.0/rubygems.rb:283:in `find_spec_for_exe': Could not find 'bundler' (2.3.15) required by your /Users/s15236/workspace/typeprof/vscode/src/test/simpleProgram/Gemfile.lock. (Gem::GemNotFoundException)
[vscode] stderr: To update to the latest version installed on your system, run `bundle update --bundler`.
[vscode] stderr: To install the missing version, run `gem install bundler:2.3.15`
[vscode] stderr: 	from /System/Library/Frameworks/Ruby.framework/Versions/2.6/usr/lib/ruby/2.6.0/rubygems.rb:302:in `activate_bin_path'
[vscode] stderr: 	from /usr/bin/bundle:23:in `<main>'
[vscode] failed to invoke typeprof: error code 1