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Spark is not working on Ubuntu 20.04

Hi All.
After upgrading Ubuntu Desktop from 18.04 to 20.04, Spark-messenger stop working. I tryed to uninstall and reinstall but that’s the same.
It looks like the installation run well, but at the end, there is no shortcut created and when i go to the spark installation directory to launch it, it start but impossible to connect to our OpenFire server.
For informations, Pidgin is working like a charm.
Any idea?
Thanks a lot for any help.