Error: No resource found that matches the given name (at 'text' with value '@string/maintitle')

I have put the (what I believe) correct code into the strings.xml file. This is what it looks like inside the strings.xml file along with the others. This is the main title. When I point to the string in string.xml from main.xml, it gives me this error: Error: No resource found that matches the given name (at 'text' with