The Federation Service has encountered an error while loading the trust policy. A resource partner with Windows trust enabled ...

The Federation Service has encountered an error while loading the trust policy. A resource partner with Windows trust enabled also has enhanced identity privacy enabled. 
Resource partner URI: %1 

If this error occurs during startup of the Federation Service, the Federation Service will be not be able to start, and all requests to the Federation Service will fail until the configuration is corrected. If this error occurs while the Federation Service is running, the Federation Service will continue to use the last trust policy that was loaded successfully. 

User Action 
This error should only occur if the trust policy file has been modified without use of the AD FS administrative tools. Disable enhanced identity privacy or Windows trust from the resource partner in question.