Maybe it's a technical glitch. Sometimes the app has issues loading music. Try restarting your device or the app and see if that helps.
It could be that the music you're looking for isn't available in your region or there are copyright restrictions. Also, check if your IG app is up to date.
Maybe there's a problem with your IG settings or your device's compatibility. Check both and see if that helps.
It could be that your music rights or permissions aren't set up correctly. Also, sometimes IG has certain restrictions based on your region or account settings. Check those out.
Maybe it's a technical glitch or a temporary issue with the app. Sometimes these things happen randomly.
Maybe there's a problem with your IG app. Try updating it to see if that helps.
Maybe there's a glitch in the app or your internet connection is unstable. Try restarting your device and the app to see if that helps.
It could be that your IG version isn't updated. Make sure you have the latest version to access all the features, including adding music to your story.
Maybe there's a problem with your app settings or your internet connection.
It might be due to a network issue. A poor internet connection can stop the music from being added. Try switching to a different Wi - Fi network or using your mobile data instead.
It might be that your region restricts the use of certain music on Instagram stories. Different regions have different laws regarding music rights.
One reason could be that the music you're using is copyrighted and Instagram doesn't permit the sharing of unauthorized copyrighted material. So, if it's a song from an artist, you need to get the proper license or use Instagram's own music feature.