Problem

-- The following error immediately shows up when attempting to open the Composer GUI:

InvalidArgumentException [Invalid supplied arguments: {}]

At com.sun.javaws.Main.continueInSecureThread (Unknown Source)

At com.sun.javaws.Main.access $ 000 (Unknown Source)

At com.sun.javaws.Main $ 1.run (Unknown Source)

At java.lang.Thread.run (Unknown Source)

Resolution

* Issue is caused by firewall restrictions blocking the port to be opened for the "server.serverFixedPort=" because the lockdown of ports.

* To resolve the issue, request access for a fixed port through the firewall.

* After the port is opened at the firewall, set the port value for the "server.serverFixedPort=" parameter. Then restart Composer.