Plgin Updatation Problem

Hello ,
Today I was Updating the plugins of my website Pinstaram . Because when i Log on to my website wordpress account .It ask me for two update : 1 is Jetpack and 2nd is All in one seo .
When i Click on Update it automatically Shown me an error That Website is under Maintenance or under Processing . And Website was not Showing as well anything except this.My website is still under this error due to updation problem of plugins .Please Tell me the solution what to do .Is there need to re-install the word press and website again.Any Help Please.