When you try to install the Auto Poster plugin through the administration page Plugin> All Plugins> Install Button menu the following message appears as warning:

Can not download / extract remote files; Please contact Flynax service.

After updating the page with F5, the plugin is listed with "To be installed" status.

When clicking "Actions> Install" appears the message with the warning "The install.xml file has not been found in the plugin folder, please make sure it is there."

I would like to know how I can solve this problem to install the plugin successfully.