There are several places for failure in there, as noted above. Most are pretty easy fixes given how high up the drips are coming from. (If it had ruptured it would just all come out the bottom, so likely a return line.) But it seems well-protected, so who knows.
I use a large LED light up in that space by the spare tire and under the edge of the trim to backlight it. (Same way I fill it- although I once left a flashlight there and it came off on the road...) Look for cracks and shifted hoses. There are some lines on the translucent plastic tank for filling levels, all set from the N height position.
I would not use the system, including comfort lowering, until you have a good handle on the problem or it can be expensive to get it all sorted out.
The pressure fittings/adjuster/relief are just carbon steel and rust like hell. There are some horror show pictures here, and then the fittings seize or break when used. I use LPS 3 and spray it on. It collects dust, but no rust.
To your earlier question, that tank is huge in comparison to the volumes, and mine never spilled a drop in the hot desert at crazy angles. The "cap" is just a simple twist bayonet that somebody could have just slid on but not turned, but even then it is mounted very high- so maybe just return fluid. Twist it back into place. The fill lines are hard to see, so in theory it could have been way overfilled.
There are several posts on the bleeding-filling, once you learn to do it, no problem and simple maintenance.
