Impressions reduced on 95% after 3 months of active campaign running

Hello,

I have campaign I was succesfully running last 3 month. The problem is that ussualy every day I had 2000-3000 impressions every day. But now it's just 0-10 impressions for last 2 weeks.

I doubled max bid but still doesn't work.

Also I checked budget and paused/started campaign again but still no results.

Could you please advice how to fix that issue.

Thank you