Magento: It says 'Service not available' after plugin re-installation/upgrade

Magento: It says 'Service not available' after plugin re-installation/upgrade

Issue

There will come a time when the JMango360 plugin needs to be re-installed or upgraded to a newer version. However, after re-installing/upgrading the plugin, console screen shows that the plugin already exists. As a result, your website might be down and display 'Service not available'.


Cause

The issue happens because you forgot to uninstall the current JMango360 plugin before re-installing or upgrading it. 

Solution

Step 1: Get your Magento website up again by doing the following:
  1. Connect to your website hosting using your preferred client such as FileZilla or WinSCP.
  2. Go to Magento Root folder and delete the file 'maintenance.flag'
Step 2: Uninstall the JMango360 plugin then re-install or upgrade it.