As the others have said, the lack of cruise control is a symptom...the brake light stuck on is the likely root cause...
On or about the time the cruise control went out, did you add an accessory or do some work near the right handle bar controls. Might want to start there and try to inspect that brake light switch under the brake lever.
If you check the manual, when ever you work on the controls or master cylinder, you must "shim" the lever in the actuated position or you can damage the little momentary switch nib/end. When you disassemble be very careful that the copper colored spring clip does not fall out, and you inspect the wiring going into the handlebar/control halves are not pinching any of them.