how to resolve error on circleci "bash: line 1: bundle: command not found"

My tests were all passing yesterday on circle and are still passing today locally but now I this error message. Whats going on?

bundle check --path=vendor/bundle || bundle install --path=vendor/bundle --jobs=4 --retry=3 
bash: line 1: bundle: command not found
bash: line 1: bundle: command not found

bundle check --path=vendor/bundle || bundle install --path=vendor/bundle --jobs=4 --retry=3  returned exit code 127

Action failed: bundle install