Solution
Step1: Firstly, check ERA Server an updated version is present or not. If not then update it.
Step2: Go to the below folder path
Path: C:\ERA\metabase\ro
Step3: There will be Download and Web Folder present
Step4: Rename that folder as old (exp. old_downloads , old_web)
Step5: Restart the ERA server
Then check this issue will get resolved. If the issue persists then generate the SOLAR ticket.