It's difficult to guess, in that case. If the Opus version & configuration is identical on the two machines, and they're accessing exactly the same network share, mounted in the same way, and the same files on it, then there must be some other difference between the machines, or with the network/firewall/etc., which is causing things to fail. (Otherwise they would fail on both machines.)
The Crash, exit or high CPU usage when viewing certain directories guide may have useful suggestions in tracking down what is failing when the folder loads, particularly if it is due to a 3rd party shell extension that is only installed on one of the machines.
Process Explorer may also be useful for investigating where things are failing (although it is quite a technical tool).
It may also be worth updating to a newer version of Opus, since 10.5.0.5 is a bit old now and was also a beta version.