Warning: failed to init SDL thread priority manager: SDL not found

[b5030]

Describe the bug
Brand new install of the server to a docker compose image and receive that error message.

To Reproduce
Steps to reproduce the behavior:

1. Following this guide https://containers.fan/posts/setup-7days-game-server-in-docker/
2. Create a compose.yaml file
3. And run docker compose up
4. See error

Expected behavior
Server should start without error

Versions:

• Docker Compose version v2.14.1
• Docker image version 3.8

Docker/Docker-compose
version: '3.8'

services:
7dtdserver:
image: vinanrra/7dtd-server
container_name: 7days-gameserver
environment:
# documented here
# https://github.com/vinanrra/Docker-7DaysToDie#parameters
- START_MODE=1
- VERSION=stable
- PUID=1000 # your uid of your user
- PGID=1000 # your gid of your user's group
- TimeZone=Africa/Johannesburg
- TEST_ALERT=YES
#- ALLOC_FIXES=YES #Optional - Install ALLOC FIXES
volumes:
- ./data/serverfiles:/home/sdtdserver/serverfiles/ #Optional, serverfiles
- ./data/7daystodie:/home/sdtdserver/.local/share/7DaysToDie/ #Optional, maps files
- ./data/log:/home/sdtdserver/log/ #Optional, logs
- ./data/backups:/home/sdtdserver/lgsm/backup/ #Optional, backups
- ./data/lgsm-config:/home/sdtdserver/lgsm/config-lgsm/sdtdserver # Optional, alerts
ports:
- 26900:26900/tcp
- 26900:26900/udp
- 26901:26901/udp
- 26902:26902/udp
- 8080:8080/tcp
- 8081:8081/tcp
- 8082:8082/tcp
restart: unless-stopped #NEVER USE WITH START_MODE=4 or START_MODE=0
logging:
driver: "json-file"
options:
max-size: "1m"

[b5030]

It looks like it might be an issue with Linux Game Server Manager (#189 (comment)) so I will try using Alpha21 and report back

[b5030]

Tried setting version to both alpha20.7 and alpha21.0 with no luck. Still receiving

Warning: failed to init SDL thread priority manager: SDL not found