APEX version 21.2
Environment 12c
Problem
We appear to be unable to edit a Custom Theme style (based on Vita and created in Theme Roller in APEX 19 & 20) using the Universal Theme. It looks like from release 21 the format of the css file has changed. The custom style contains the corporate style colors etc.
Question
Is there any way to convert the existing theme style css format to be useable in release 21.2? Or do we have to start from scratch all over again?