Hello,
Thanks for contacting us about your install error, That error message is one that originates from the unzip function within WordPress, Unfortunately, that error means the file that was uploaded to WordPress was corrupt so it was not able to unzip the file. The best solution would be to download a fresh copy of the zip file and try to import the new file instead. Alternatively, if you are still having issues importing it you can extract the file locally and upload the contents via FTP to your wp-content/plugins folder in the document root of your site, after doing this the plugin should show up in your dashboard and you can enable it.
Best Regards,
Kyle M