Soil stays wet. plant looks drowned

this is a hindukush auto plant. I planted 4 of them exactly 3 months ago then i gave one pot to a friend due to lack of space. My pots growed very well and im smoking them now. but this one was put in a tent with a jack herer on hydroponics. tent was full of humid. I saw the plant 2 weeks ago and it was full of health flowering nourishing etc. now it looks like this and the soil is wet. it looks like a major problem rathen than a simple deficiency. do you have any idea?

What kind of soil do you have it planted in? Tell us more about the conditions it's in.

its light mix biobizz. he had better growing conditions than mine. he has another one in the same tent growing very well. but something happened to this one.