LTSpice calculates 1.#INF for operating point
The reason for this is explained in the LTspice Help under B. Arbitrary Behavioral Voltage or Current Sources.  The relevant section is pasted below, but here's a web-link to a cached version of that help section.

Circuit element currents; for example, I(S1), the current through switch S1 or Ib(Q1), the base current of Q1. However, it is assumed that the circuit element current is varying quasi-statically, that is, there is no instantaneous feedback between the current through the referenced device and the behavioral source output. Similarly, any ac component of such a device current is assumed to be zero in a small signal linear .AC analysis.


Since your circuit is linear, you should be using an F-source instead.  This requires an additional 0V voltage source in the circuit branch you want to reference, as shown below.  See the help page for F. Current Dependent Current Source for more information.