On this page of the Assassin's Creed Valhalla game guide, you will find a detailed walkthrough description of the mission Rowdy Raiders.
The mourning feast got a little out of control and Trygve asks Eivor to control the situation.
Reward: 1,700 XP.
Speak to Trygve
Go back to the longhouse in Henthorpe to talk to Trygve. The man could not cope with the crowd that came to the settlement and prematurely started to celebrate the glory of the dead Jarl.
Find and calm the guests
Visitors who make noise and cause problems can be found all over the Hemthorpe settlement, sometimes in unusual places. You will find them with the help of the raven or with Odin Sight - they will be highlighted in blue. Talk to them and help them, or bring them down as in the case of the drunken men you'll sometimes find on rooftops.
Once the situation in the settlement is under control, go back to Tygve and talk to him. The mission will end and you will receive 1 700 XP as a reward.