Example use with a monorepo

I am attempting to test with a simple monorepo with two projects. A vue.js frontend and a golang backend. I’ve attempted to setup an action for each along with the path. When I do not use the multirepo-tags: true option I get errors. However, when setting it to true there is never a PR created.

On a commit with a subject of: fix(frontend): Update the following output is received:

Run GoogleCloudPlatform/release-please-action@v2
  with:
    token: ***
    release-type: node
    path: frontend
    package-name: frontend
    monorepo-tags: true
    fork: false
    clean: true
    bump-minor-pre-major: false
    pull-request-title-pattern: chore${scope}: release${component} ${version}
✖ No merged release PR found
✖ Unable to build candidate
✖ pull #60 046444097948def303e3c556c6ce42470591b7bd has not yet been released

Is there an example of exactly how to use release-please with a monorepo and what exactly monorepo-tags does?