I installed the plugin manually by uploading the plugin folder to /wp-content/plugins.
I can activate it without problems but it fails scanning the site; this is output example:
Name: xxxxxxxxxxx
The plugin/theme was skipped as it was too large to scan before the server killed the process.
Name: xxxxxxxxxx
The plugin/theme was skipped as it was too large to scan before the server killed the process.
Name: xxxxxxxx
The plugin/theme was skipped as it was too large to scan before the server killed the process.
Name: xxxxxxxxxxxxxx
The plugin/theme was skipped as it was too large to scan before the server killed the process.
Name: xxxxxxxxxxx
The plugin/theme was skipped as it was too large to scan before the server killed the process.
Name: xxxxxxxxxxxxxx
The plugin/theme was skipped as it was too large to scan before the server killed the process.
Name: xxxxxxxxxxx
The plugin/theme was skipped as it was too large to scan before the server killed the process.
......`
The HTTP server is IIS (Microsoft Information Server)
Thanks,
Oscar