PSPICE Simulation of Cascode Amplifier Not Working
Very simple problem with an equally simple fix. Your entire circuit is floating. You need to use this for GND:



Edit: Node 0 is the internal reference in SPICE for all voltages, and the ground symbol with the graphic '0' is connected to it. Every node in your circuit must have a DC path  to node 0 (even if that path is a 100G ohm resistor). The ground symbols without the 0 are simply connected to all the other similar symbols with the same net name (GND or GND_POWER typically). You could also edit the node name for the symbol you used from GND to 0, but I think it's better to use the provided symbol.