The particular patch of land is still suspected to contain mines, although "in theory" they were all cleared out.
The client didn't want to pay for the minesweeeping tech team to ensure safety, the workers didn't want to wade into a forest that might still be mined.
I suspect this is not an isolated case. It's far from over.
Guess they will have more work now
On one hand it might be a real risk.
On the other hand nobody except the timber industry is cutting down a random tree in the middle of the woods. If you're trimming trees on a power line cut or at the edge of a clearing you're working somewhere that has already been gone over with men and machine to make that cut or clearing. So it might be one of those "basically no chance but due to rules... blah blah licensed professionals... blah blah insurance.... blah blah" where even though everyone knows it's fine the guy who has to do the work can't just go do the work without paying someone else to take the liability, etc, etc.
But then again, it's Croatia. They're not rich enough to afford that kind of dysfunction.
Turtles all the way down.
Thing is, you can't narrow it down to some acceptable level of risk. Mines are by definition stealthy, the only way to reduce the risk is to eliminate it by combing over everything, which is extremely hard, tedious, expensive, etc.