I cannot install JReviews, get the error "There was an error uploading this file to the server. Unable to find install package."
Some servers don't allow uploading files larger than 2 MB by default. To check if this is the case on your server, go to the System Information page in Joomla Administration, click the PHP Information tab and search for upload_max_filesize setting:
This value should be set to at least 8M. If it is lower, you will need to edit the php.ini file on your server, find the upload_max_filesize setting and increase its value.
You also need to make sure you are uploading the correct installation file. Read Installing JReviews component for more info.