Hello,
well, to verify the problem I did the following steps during the last hours….
– used Chrome instead of Safari (Mac OS X)
– used Chrome and IE 11(Windows 8)
– restarted nginx and php5-fpm
– uninstalled and installed the plugin on both systems (source / target)
…finally I gave up.
– Archive size approx. 200MB
– sometimes the plugin reaches the state “Unpacking archive”, but it will not return
– sometimes the upload reached 100% and then the plugin told me that it is unable to determine the status. and asked me: Is your server running? (not funny at all)
the wp servers run on Ubuntu 14 AMIs and the site is on accessible through AWS Loadbalancers and HTTPS.
I loved the previous version of this plugin. They worked in my environment. The new fancy version sucks.