plug in failure

I have a Mac OSX El Capitan, Safari browsing system. I play Farmville and can get the farm to load but after 3 minutes I get plug in failure. This has been going on for 10 days now. They say it's an Adobe flash player problem with this new update of 21.0.0.182. I've done everything to try and fix the problem to no avail. Is anyone going to correct this, it's affecting thousands of people that play Farmville, not just me.