Turn off Compilation mode
- If compilation mode in your Magento is enabled in your Magento store, you have to turn it off, otherwise your store and admin site would be inaccessible after installing the extension.
- To disable Magento Compilation, go to System–>Tools–>Compilation.
- Also, make sure you have backed up your Magento files and databases in case things go rogue.
Turn on cache
- You have to turn on your configuration cache to prevent early installation, as it could be a reason of errors.
- Go to System→Cache Management.
- Switch Action to Enable and hit Submit.
Perform the Installation
- After purchasing and download the module's zip file, unzip it into a directory of your choice.
- We recommend using FileZilla to perform the installation via FTP. Enter your store's Host IP, Username and Password, then hit Quickconnect
- Carefully upload the files of the module to the corresponding directory
Post-installation
- You should refresh Magento's cache to provide Magento with the ability to register a new extension.
- To prevent an “Access Denied” error, you have to re-enter to the backend. Log in with a full administrator account to get the new permissions.
- Now you should check whether your website and your new module works as expected.