ErrorException: Template error: Function parse_less_color is unknown

#0 [internal function]: XF\Template\Templater->handleTemplateError(512, 'Function parse_...', '/home/spigottr/...', 840, Array)
#1 src/XF/Template/Templater.php(840): trigger_error('Function parse_...', 512)
#2 internal_data/code_cache/templates/l1/s2/public/PAGE_CONTAINER.php(362): XF\Template\Templater->fn('parse_less_colo...', Array, true)
#3 src/XF/Template/Templater.php(1230): XF\Template\Templater->{closure}(Object(ThemeHouse\UIX\XF\Template\Templater), Array)
#4...