Hi there Bivit
Thanks for using QandA platform
The basic and first approach is to try uninstalling and reinstalling the Azure Cosmos DB Emulator. Now try running it. i suggest you to try this similar solution i found.https://azurelessons.com/azure-cosmos-db-emulator-not-working/#:~:text=The%20basic%20and%20first%20approach%20is%20to%20try,Azure%20Cosmos%20DB%20Emulator%20and%20install%20it%20now.
If this helps kindly accept the answer thanks,much.