There is a Quest to add at Therapist so I post the content here.
Lost Contact
Location: Lighthouse EXP Reward: 7000 EXP Money Reward: 42100 Roubles Standing Reward: +0.02 at Therapist
Find the lost group in the chalet area on Lighthouse. Survive and extract from the location.
The group of dead bodies is locatet on the tenniscourt in the first chalet near the tunnel (extract for PMC and Scav)
Admins feel free to add the quest to Therapist with this. I hope i could help everyone with this.