The first block, modeled as a current source, cannot be connected in series with the inductive element of the second block.

The following two blocks cannot be connected in series:

Block 1: 'A_stator: Asynchronous Machine SI Units'

Block 2: 'Series RLC Branch2'

The first block, modeled as a current source, cannot be connected in series with the inductive element of the second block.

Add a high-value resistance in parallel with one of the two block. You can also specify high-value resistive snubbers if the blocks have a snubber device.You can avoid the use of the snubber by selecting the 'Continuous' simulation type in the Solver tab of the Powergui and deselecting the 'Disable ideal switching' option in the Preferences tab of Powergui block.