Intonation problems on high E string

Hi all,

I'm having problems intonating the high E string on my Squier by Fender Classic Vibe Stratocaster 50s. I've adjusted the saddle all the way and it is still flat by 15 cents when playing at the 12th fret.

Here's an image of what it looks like:


I'm unsure of what I can do next to be honest. Do I have a bad string and just need to replace it? I'm very much a beginner so apologies if I'm missing something obvious.

Any help is appreciated.

Thanks brothers.