Board Game Arena

I have a convoy and a warship in Tripoli and I want to use the convoy to supply my troops in North Africa. However, the convoy is darkened and I can't seem to find a way to activate it supply purposes in the supply phase despite several attempts.
What am I missing.

P.S. This is on Tuesday April, 20th. I.e. after the latest patching of the supply rules.

ok try this:
You are in supply phase.
Acyive a unit, which you want to supply -> click to port, where you have convoy (for exaple Tripoly) -> You click "use convoy" in top of website ->make a sea supply trace to mainland area.

If you have a question please write

Tx. Off to the games.

Thanks again, now I know more on how to play this game.