If you are trying to install the web part on a SharePoint 2019 server, you may encounter the following error when adding it to your site: “Sorry, apps are turned off. If you know who runs the server, tell them to enable apps.”
Here are the possible reasons and solutions for this error:
Apps are not enabled in your farm | Ensure you have Apps enabled in your SharePoint 2019 farm. |
Subscription service is not setup | The first and most likely problem is that the subscription service is not configured in your farm.Please configure it. |
The app management service is not associated with your web application | Make sure the app management service application is associated with the web application where you want to add the SPFx web part. |
App URL is not configured | If you have not configured the app URLs, please ensure you have given values to App Domain and App Prefix in your App Store settings. |
If the error persists after following the above solutions, please create a ticket so our technical support team can analyze the problem.