Microsoft.Mashup.Evaluator.Interface.ErrorException: Access to the path .. denied

Unexpected error: Access to the path 'C:\Users\----\Microsoft\Power BI Desktop Store App\Cache\2f3137eb-50d1-4434-9845-739be2b49e9f.dat' is denied.
Details:
"Microsoft.Mashup.Evaluator.Interface.ErrorException: Access to the path 'C:\Users\---\Microsoft\Power BI Desktop Store App\Cache\2f3137eb-50d1-4434-9845-739be2b49e9f.dat' is denied. ---> System.UnauthorizedAccessException: Access to the path 'C:\Users\----\Microsoft\Power BI Desktop Store App\Cache\2f3137eb-50d1-4434-9845-739be2b49e9f.dat' is denied. ---> System.UnauthorizedAccessException: Access to the path 'C:\Users\--\Microsoft\Power BI Desktop Store App\Cache\2f3137eb-50d1-4434-9845-739be2b49e9f.dat' is denied.
at System.IO.__Error.WinIOError(Int32 errorCode, String maybeFullPath)
at System.IO.FileStream.Init(String path, FileMode mode, FileAccess access, Int32 rights, Boolean useRights, FileShare share, Int32 bufferSize, FileOptions options,"

Why am I getting this message all of a sudden while performing some some data transformation in PowerBi , PowerQuery interface.