Auto Pineapple Express

Somethings not right here n i wouldn't have a clue what it is have done everything the same as my last auto and I've gone wrong somewhere which i'm not happy about because i only had one of these seeds to grow I've had a look in the coco and there's nothing eating or damaging the roots so tried using a stronger nute mix for a bit but it didn't like that so I've flushed and re adjusted the nutes n will see what happens 👍 happy growing <3