What does Branch is empty mean?

[ooker777]

When I push the vault I get:

Failed to load resource: the server responded with a status of 422 ()
[GITHUB PUBLISHER] HttpError: Validation Failed: {"resource":"PullRequest","field":"base","code":"missing_field"}
    at eval (plugin:obsidian-mkdocs-publisher:56:21991)
[GITHUB PUBLISHER] Error with QuaCau-TheSphere/DW-phat-trien-ban-than: TypeError: Cannot read properties of undefined (reading 'number')
[12:41:42.923](eval):
 file published : 150 notes

The setting:

{
  "github": {
    "branch": "",
    "automaticallyMergePR": true,
    "api": {
      "tiersForApi": "Github Free/Pro/Team (default)",
      "hostname": ""
    },
    "workflow": {
      "name": "",
      "commitMessage": "[PUBLISHER] Merge"
    },
    "verifiedRepo": true
  },
  "upload": {
    "behavior": "obsidian",
    "defaultName": "docs",
    "rootFolder": "",
    "yamlFolderKey": "",
    "frontmatterTitle": {
      "enable": true,
      "key": "filename"
    },
    "replaceTitle": [],
    "replacePath": [],
    "autoclean": {
      "enable": true,
      "excluded": [
        "asset"
      ]
    },
    "folderNote": {
      "enable": false,
      "rename": "index.md"
    },
    "metadataExtractorPath": ""
  },
  "conversion": {
    "hardbreak": true,
    "dataview": true,
    "censorText": [],
    "tags": {
      "inline": true,
      "exclude": [],
      "fields": []
    },
    "links": {
      "internal": true,
      "unshared": false,
      "wiki": false,
      "slugify": false
    }
  },
  "embed": {
    "attachments": true,
    "keySendFile": [],
    "notes": false,
    "folder": "docs/attachments"
  }
}

[Mara-Li]

You need to set a branch in the setting.
Probably master or main, depending of your repo…