Our attempt to publish the add-in was rejected with the following description
1220.2.1 Custom Functions Metadata Files It appears that custom functions HTML and Javascript metadata files are missing in your manifest.
Please notice that your offer must host all custom functions HTML, Javascript, and JSON metadata files on the same domain. Please update the location of the custom functions metadata files and re-submit your offer.
But we configured our Excel Add-in to use a shared JavaScript runtime according to documentation and the sample on OfficeDev gitlab repository.
All custom function are inside index.html. In the manifest, the resource is represented as <bt:Url id="SharedAddin.Url" DefaultValue="https://ourDomain.com/excel-plugin-js-version/" />.
In our manifest there is link to custom function metadata file (<bt:Url id="Functions.Metadata.Url" DefaultValue="https://ourDomain.com/excel-plugin-js-version/functions.json"/>).
All custom functions files are hosted on the same domain. The index.html file URL: https://ourDomain.com/excel-plugin-js-version/ and the functions metadata file URL: https://ourDomain.com/excel-plugin-js-version/functions.json.
Could somebody help us with the issue identification, please?