Hello Engazan,
We understand that you're unable to create a radio station from an artist. Please try the following steps in order and let us know if they help.
First, update to the most current version of iOS - Update your iPhone, iPad, or iPod touch
Then, test creating a radio station with other artists. Additionally, Listen to the radio in the Apple Music app - Apple Support and let us know if there are any issues.
If the issue persists, open the Settings app, tap Music and turn off Show Apple Music. Then turn the feature back on. If it still doesn't change, then sign out of the iTunes & App Store and then remove and reinstall the Music app from the App Store. Please note that signing out of the iTunes & App store will remove any songs you downloaded to your iPhone from Apple Music, but your library remains intact. To do that. tap Settings > iTunes & App Store. Tap to select your Apple ID, then tap Sign Out.
Let us know what happens. We look forward to hearing back from you!