title: Exception during cache and session cleaning while installing- Zopin live chat extensions in megento
body: <p>when i am trying to install Zopim live chat megento extension, i am receiving "Exception during cache and session cleaning". but installed successfully. After installtion with this above error, i tried to open site, its shows "The server is temporarily unable to service your request due to maintenance downtime or capacity problems. Please try again later." 503 error. Please help me how to resolve this problem.</p>
  
  <p>Thanks
  Bala</p>