@kalpitmantri , Your UiPath Studio license should have been expired.
Regarding the UiPath orchestrator issue try clearing cache and cookies of UiPath cloud, alternately trying signing in from incognito or other browsers.
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Please follow the steps to check your license. Login to cloud.UiPath.com > Go to Admin section > Go to licenses and check if you have a valid license.
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If you have a valid studio license. re-connect to orchestrator from UiPath assistant.
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Restart UiFlowService.Exe from task manager.
Mark as solution if you find it helpful.
Thanks.