Could having non responsive website drop you in rankings?

[Oimachi2]

My site has been ranking great for a decade, but suddenly, about 4 months ago it tanked, tried everything, can
t get it back up.

Now this week I got an warning in webmater tools saying it's not responsive, and it ISN't at all...

Could that be the reason for the drop?

Will converting to responsive make me come back up?

Any cases like this?

Thanks

[fathom]

A dropped 4 months ago isn't likely related to any warning since Google hasn't officially launched their mobile algorithm yet ... April 21, 2015.

[adder]

tried everything

@Oimachi2 what exactly did you try?

4 months ago, would that be early December? I'd look at Penguin 3.4. if I were you. It's not officially confirmed but I remember seeing some websites disappear around that time.