LTspice, Warning node is floating in XNOR simulation

[Yukta2007]

I am getting these errors when i am trying to connect the circuit. Can anyone please help?

 

[Alec_t]

Welcome to EP!
With any query concerning LTspice, please post your .asc file.
Also, note that the default FET models should be replaced by 'real world' FET models to run a useful simulation.

 

[Harald Kapp]

We have a collection of LTSPICE errors and how to deal with them. Have a look at the .gshunt option mentioned there.
Also follow @Alec_t 's advice and use real MOSFET models. If the problem still persists, post your .asc file for inspection.