Hi @Fabo Amaya
Teams tag is mainly focused on the general issue of Microsoft Teams troubleshooting. According to your description, your question is not in our support scope.
The following suggestion is for your reference. When uploading a custom app in Teams, please ensure that the following prerequisites are met:
- Ensure to create your app package and validate it for errors.
- Enable custom app uploading in Teams.
- Ensure that your app is running and accessible using HTTPs.
If your app fails to upload or encounters any issues to upload, check the following options:
- Ensure that you follow all the instructions for creating your app package.
- Validate your app package.
- Ensure your app manifest matches with the latest schema.
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