@Enugula, Srikanth (Cognizant) Based on the error message, Delete data from "%appData/StorageExplorer" folder or entire folder from your machine. After deleting when you launch storage explorer you will be prompted to re-enter your credentials.
This guide summarizes solutions for this issue seen in Storage Explorer. "Unable to Retrieve Children"
This article provides complete resolution for Azure Storage Explorer Troubleshooting: "unable to retrieve child resources” error message
If the issue still persists, Un-install and re-install the latest Storage Explorer
You can also refer How to connect to Hot Folders to Azure Storage Explorer
Hope this helps! Kindly let us know if the above helps or you need further assistance on this issue.
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