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Published Jul. 2, 2025

I cannot create new Virtual Instance with error Screen name must not be null

Written By

Rafael Regner

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Issue

  • When I try to create a new Virtual Instance, the portal displays the error "Your request failed to complete".
  • The portal log shows the following error: 
    ERROR [default task-29][EditInstanceMVCActionCommand:121] com.liferay.portal.kernel.exception.UserScreenNameException$MustNotBeNull: Screen name must not be null for user 1152048

Environment

  • Liferay DXP 7.2

Resolution

  • When you create a Virtual Instance, an admin user is also created for that Virtual Instance.
  • Liferay uses the default.admin.screen.name property in the portal-ext.properties file to create this admin user.
  • To resolve the issue, set the default.admin.screen.name property to a valid admin user.

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