Is what you are trying to use actually a ringtone or is it a regular song?
Use tones and ringtones on your iPhone, iPad, or iPod touch - https://support.apple.com/kb/HT207955
Is what you are trying to use actually a ringtone or is it a regular song?
Use tones and ringtones on your iPhone, iPad, or iPod touch - https://support.apple.com/kb/HT207955
Why I can’t use ringtone that I purchased