1- To resolve this issue, you need to uninstall RealPlayer as described below:
Please do not install RealPlayer at this stage, just follow this steps to remove RealPlayer and delete the application folders. You will install RealPlayer when you reach the line number 2.
IMPORTANT: Make sure you delete the application folders as described here: https://customer.real.com/hc/en-us/articles/220342848
2- Restart your computer and install RealPlayer by clicking here: http://www.real.com/
3- Sign in to RealPlayer. Here is how to do it: https://customer.real.com/hc/en-us/articles/204040653
I have edited your post to remove your personal information for your own safety.