Updated skuid from version 10 to 12.2.8

We have update skuid from version 10 to 12.2.8  in salesforce and it showed error" Theme could not be found. Test Defaulting to Classic."  but I am working on the classic theme only and if I change the skuid theme then also it showing the same error. 

If you go to the Themes page, is “Update out of date Themes” visible for you? A button in the top right.

No, there is no button"update Out of date Themes"

See my reply here