Maytag Dryer show E6 light n won't turn on

I just washed n put a kinda wet booster in the dryer & turned on E3 for the dryer program cycles n it stopped after the cycle E3 done. During the dryer dried the booster I saw the liking water came from the side door, n through the washer door. The dryer n washer are the old stack type. I tried to dry more because the booster was still wet, but suddenly it showed E6 light on.

I unplugged the cable for about 15mins, then plugged in again n tried to turned on the dryer but E6 light still on.

What should I do? any suggestion? any of the dryer spare part has to be replace or broken?

Tq.