Custom theme is not showing up correctly after Yokohama upgrade. - Support and Troubleshooting

Custom theme is not showing up correctly after Yokohama upgrade. Issue Customers report that the instance theme is changed to the OOB theme even though they have configured the property correctly "glide.ui.polaris.theme.custom".

Release Yokohama and later

Cause Prior to the Xanadu release, overriding the Next Experience theme using the glide.ui.polaris.theme.custom system property was the primary way to apply a custom look globally. As of Xanadu, you are able to publish multiple themes and select a theme for the Next Experience. The glide.ui.polaris.theme.custom system property is only considered if the UX Parent App Themes table is empty.

Resolution 1. Verify the system property 'glide.ui.polaris.theme.custom' points to the correct custom theme. 2. Clear the UX Parent App Themes (m2m_app_theme) table to ensure the system property is considered.

Related Links https://www.servicenow.com/docs/r/platform-user-interface/override-next-experience-theme.html