Trying to get into the UCCX RTMT received “Access denied, check IP address, username and password” message. If The IP address and credentials are 100% correct, maybe wrong user?:)
How to check: Using CLI run the following command:
admin:run sql select* from cuic_data:cuicuser

Check which user is the super user and use it to login.
Below is the path for installing current version of RTMT:
UCCX > Login > Tools > Plug-ins > Cisco Unified Real-Time Monitoring Tool for Windows/Linux