The Extensis font panel in Adobe Creative Cloud applications for Universal Type Client 6 is blank
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When upgrading from UTC 6.1.6 to 6.1.7, Adobe Illustrator plug-in does not function (Mac)
Universal Type Client and Adobe InDesign - Links have been modified and need updating
Universal Type Client 6 is not able to add fonts to the font workgroup (Mac)
"Unable to connect to the Type Core due to an invalid hosts file” when opening Universal Type Client 6 for Mac OS
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Font Display Issues in Safari, Google Chrome or other applications - Universal Type Client 6 (Mac)
Universal Type Client 6 will not display new or added workgroups
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Updating to macOS 10.12 (Sierra), Universal Type Server 6 has stopped working (Mac)

Jeff

October 10, 2018 22:14
Updated

Description
Due to new macOS permissions, Universal Type Server may encounter a service interruption after upgrading to macOS Sierra.

Solution
Simply installing the latest Universal Type Server release over your current installation will restore all functionality without causing data loss.