I suggest that you perform a clean uninstall and reinstall of RealPlayer by following the below article:
If that doesn't help, I will need you to provide the following information:
- What is your Operating System (Windows XP, Vista, 7, 8, 8.1, 10)?
- Did you receive an error message?
- Do you have any security software installed (Norton, McAfee, AVG, etc.)?
- What version of RealTimes/RealPlayer is installed? (See https://customer.real.com/hc/en-us/articles/204039513).
- What web browser do you use (Google chrome/ Firefox/ Internet Explorer/ Edge)?
The more details you provide, the better I will be able to assist you.