Release Please cannot parse version string

### What you're trying to do
I am trying to setup release please to create releases for the beta as well as the production branch. I have setup two workflows for both branches. But every time I try to push to my branch I get the following error: `release-please failed: unable to parse version string: 0.1`

### What code you've already tried
**release-beta.yml**
```
on:
push:
branches:
- dev

permissions:
contents: write
pull-requests: write

name: Release Please

jobs:
release-please:
name: Create Beta Release
runs-on: ubuntu-latest
steps:
- uses: google-github-actions/release-please-action@v4
id: release-please-beta
with:
target-branch: beta
token: ${{ secrets.GH_TOKEN }}
manifest-file: .release-beta-manifest.json
config-file: release-beta-config.json

```
**release-beta-config.json**
```
{
"packages": {
".": {
"bootstrap-sha": "230495319f1b508757dd86d97565e8fb1e43f4de",
"release-type": "php",
"prerelease-type": "beta",
"prerelease": true,
"skip-github-release": true,
"release-as": "1.0.0"
}
},
"plugins": [
{
"type": "sentence-case"
}
]
}
```
**release-beta-manifest.json**
```
{
".": "0.0.0"
}
```
**Workflow output**
[github_workflow_output.txt](https://github.com/googleapis/release-please/files/14076201/github_workflow_output.txt)

### Any error messages you're getting
So far I only got this error `Error: release-please failed: unable to parse version string: 0.1`

I'm sorry if this issue is explained somewhere but I couldn't find any solution even in the issues or in the repo for Github Actions of release-please.