Norton Shows red cross but everything is up to date

Hi

Since upgrading to windows 10 my Norton is shows a red cross indicating it needs attention. However, when I open Norton everything is up to date and there is no option to click 'fix' like there should be.

The strange thing is that when I start my PC it is displays the green tick, but within five minutes it changes to red.

All scans and updates are up to date. Has anyone experienced this?

Thanks