Blog subscription gone from widget

Bonjour, I've been using Catch Box for a few year.  Wanting to do some upgrade, I've purchase the CatchBox Pro almost a year ago.  Last week, after seing that I had SSL issue, looking for solutions, I noticed that my key wasn't fully programmed with my theme.  I did the programing andan update of the theme was sent and I updated it. However, I just come to realise that I was using the "WP blog subcription widget" (I don't remember the exact name) where my follower could subscribe and get update e-mail (from WP) when I posted a new post.  Having different issues with my site, I didn't look for that specific bug.  Now that all my other issues are fixed, I try to find my "post subscription widget" and it's not there.  Now, when I post a new one, no e-mail are sent, even if I kept the default "http://rpc.pingomatic.com/" in my setting/writting tab.  Noting come out!  I had a couple of test adressess and none of them get notification.  I've check with a few follower, same at their end.  I even manually went on pingomatic.com and force a publication...  Noting! :( I don't know what to do ? Many thanks... Phil clubtraindirect.com