Getting "TypeError: Cannot read property '4' of null" on deploy

Im using Serverless to deploy some cloud functions to GCP with this plugin, but I keep getting the following error printed to the consols: TypeError: Cannot read property '4' of null

This error does not prevent the project from being properly deployed, and as a sanity check I even tried running a "hello world" deploy based on the official examples: https://github.com/serverless/examples/tree/master/google-node-simple-http-endpoint

Even with the official example, the error persists.