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Undefined variable $...
You get the error message
Unable to compile the theme "...". Undefined variable $....
Crucial here is the note "Undefined variable $...". This means that an unknown variable was entered in a configuration field and in which configuration field this is the case respectively what the technical name of the field is: $...
If the error message says
Unable to compile the theme "TcinnThemeWareModern". Undefined variable $twt-color-brand-primary-light: line: 12, column 1, for example, the theme cannot be compiled or even saved due to an error in the
Just change the corresponding configuration field.
If you don't know which configuration field you are dealing with, just visit the ThemeWare® Config Finder and search there for the technical name
twt-color-brand-primary-light(without the "$").
Tip: Often this error occurs when variables are used in configuration fields, but the variables have not yet been initialized at this point. Then just use the RGBA or HEX value of a color instead of the variable.
After you have adjusted the field, the theme or the duplicate can be saved and compiled again.
If you could not solve the problem, simply start the ThemeWare® Debugging. You can open a support ticket in case you are not able to solve the problem yourself: