EAGLE - Singular matrix warning in RL circuit simulation
The problem is that you have asked for an operating point (OP) analysis which is a dc simulation, regardless of whether your voltage source is intended to be an ac source. So, the inductor L2 is shorting the voltage source.

I have no experience with how Eagle does simulations, but there may be an option to skip the OP. You might then be able to run a transient simulation, if you want to see voltage and current as a function of time. If you only want to see the magnitude and phase of ac signals then run an "AC sweep"...you can usually have that run at a single frequency rather than sweep the frequency.