I'd done everything, but screen sharing button still doesn't present at Chrome

[smalltomi3]

Here is what I did:

1. Revised the manifest.json, with

 "update_url": "https://meeting.jototech.cn/updates.xml",
  "externally_connectable": {
      "matches": [
          "*://meeting.jototech.cn/*"

2. Get the Exension ID: edhfhepkbohecicbjcgnceljemjhiglm

3. Revise the update.xml and upload, please check: https://meeting.jototech.cn/update.xml

<xml version='1.0' encoding='UTF-8'?>`<gupdate xmlns='http://www.google.com/update2/response' protocol='2.0'>
  <app appid='edhfhepkbohecicbjcgnceljemjhiglm'>
    <updatecheck codebase='https://meeting.jototech.cn/chrome.crx' version='2.0' />
  </app>
</gupdate>

4. Successfully drag and drop the extension:

5. Revise the configuration of /etc/jitsi/meet/joto-config.js, as following:

    desktopSharingChromeExtId: 'edhfhepkbohecicbjcgnceljemjhiglm',
   desktopSharingChromeDisabled: false,

6. Open link: https://meeting.jototech.cn/joto, but no screen sharing button

Any thing I did wrong???