"The following branches form a loop of rigid branches (shorts) when added to the circuit" error in Hspice
Inductors are internally represented as voltage sources, so unless you have some series resistance in there, somewhere, the circuit sees two voltage sources in parallel, which is not possible. The same for two current sources in series.
You can either add some minor resistance (something like 1 mΩ, or so) in series with any of the two, so that the local loop includes that resistance, or combine the two inductors into an equivalent one, L1 || L2.