Theme Magic error, it was working but now is not, the web page is ok, but when going to change a color of the menu, appears the error

I install a template with T3, was working perfect and now in theme magic appears 4 errors SyntaxError: filename.match(...) is null in off-canvas.less other SyntaxError: filename.match(...) is null in megamenu.less other SyntaxError: filename.match(...) is null in template.less other SyntaxError: filename.match(...) is null in bootstrap.less . THE WEB PAGE IS WORKING WELL, I only want to change a color in the menu