I strongly recommend using the compressor with a tubeless tire repair kit and not to use the sealer. That being said, check that the plastic bottle seems to be firm when trying to squeeze it (under pressure) as well as having the sealer being liquid. The bottle is under pressure to force the sealer into the hose of the compressor and ultimately into the tire so the sealer will not perform its function if the bottle loses pressure.
Silver LEAF 2011 SL rear ended (totaled) by in-attentive driver 1/4/2015 at 50,422 miles
Silver LEAF 2015 SL purchased 2/7/2015; traded 8/10/2019 at 82,436 miles
White LEAF 2019 SL Plus purchased 8/10/2019