I have similar results on POPos. Opening it with the command line shows the following segmentation fault
ERROR: Can’t open dynamic library: addons/godot-unix-socket/x11/libunixsocket.so. Error: /home/[username]/Downloads/../lib/libunixsocket.so: cannot open shared object file: No such file or directory at: open_dynamic_library (drivers/unix/os_unix.cpp:403) ERROR: No valid library handle, can’t get symbol from GDNative object at: get_symbol (modules/gdnative/gdnative.cpp:510) ERROR: No nativescript_init in “res://addons/godot-unix-socket/x11/libunixsocket.so” found at: init_library (modules/gdnative/nativescript/nativescript.cpp:1510)
I find it likely the the linux build was created without the .pak file included