Problem with Cam Link 4k and mojave

hello everyone, i can’t see the external camera through the camlink on Unreal Engine, i’ve tried all ways. i can’t install Catalina or Big Sur for incompatibility with Wirecast (streaming software).
Unreal Engine 4.25.4
now installed XCode 11.0 (last available for Mojave) but I’ve also tried with later versions of 11 but always with the same result.
Has anyone already experienced this problem or can work properly with Mojave?