Ubuntu 18.04 + Lazarus 2.2.4
I have installed the "vcl" components from my lazarus 2.2.4 "components" directory, but have been unable to execute the test program that is included with the components. The "testlcl" project compiles, but will not play any file, instead halting with the following message: Project testlcl raised exception class 'External: Unknown exception code 6'. I suspect an operator error on my part, but I don't know what to look for at this point. My VLC media player (3.0.

works properly.
Any insights into what I may be doing wrong would be appreciated. I've also tried the fpc test programs for the vlc package with the same result.