If you have this kind of problem you can read this article or simply:
This is a problem that may occur when the flash client tries to locate the RSL files (local intranet situations) and by downloading them in the bbb’s folder, the flash can safely failover to that location.
cd /var/www/bigbluebutton/client/
sudo wget http://fpdownload.adobe.com/pub/swz/flex/4.5.0.20967/mx_4.5.0.20967.swz
sudo wget http://fpdownload.adobe.com/pub/swz/flex/4.5.0.20967/rpc_4.5.0.20967.swz
sudo wget http://fpdownload.adobe.com/pub/swz/tlf/2.0.0.232/textLayout_2.0.0.232.swz
sudo wget http://fpdownload.adobe.com/pub/swz/flex/4.5.0.20967/framework_4.5.0.20967.swz
This is a problem that may occur when the flash client tries to locate the RSL files (local intranet situations) and by downloading them in the bbb’s folder, the flash can safely failover to that location.
