"Internal server error" after logon AgenDAV

[mailliwal]

`version: '2'

services:
baikal:
container_name: baikal
image: ckulka/baikal:nginx
restart: always
ports:
- "8081:80"
environment:
- TZ=Asia/Taipei
volumes:
- /volume1/docker/baikal/config:/var/www/baikal/config
- /volume1/docker/baikal/data:/var/www/baikal/Specific
- /etc/localtime:/etc/localtime:ro
networks:
baikal_net:
ipv4_address: 172.22.22.90

database:
container_name: mariadb_baikal
image: mariadb:10
restart: always
ports:
- "3307:3306"
environment:
MYSQL_ROOT_PASSWORD: ytyuu
MYSQL_DATABASE: baikal
MYSQL_USER: baikal
MYSQL_PASSWORD: 8f765gfd
TZ: Asia/Taipei
volumes:
- /volume1/docker/baikal/db:/var/lib/mysql
- /etc/localtime:/etc/localtime:ro
networks:
baikal_net:
ipv4_address: 172.22.22.91

agendav:
image: nagimov/agendav-docker:latest
container_name: agendav
restart: always
ports:
- "8082:80"
volumes:
- /etc/localtime:/etc/localtime:ro
environment:
- AGENDAV_SERVER_NAME=192.168.1.250
- AGENDAV_TITLE=Welcome to Calender
- AGENDAV_FOOTER=Hosted byHomeLab
- AGENDAV_ENC_KEY=AAA13123142fgdgf
- AGENDAV_CALDAV_SERVER=http://192.168.1.250:8081/%u
- AGENDAV_CALDAV_PUBLIC_URL=http://192.168.1.250:8081/
- AGENDAV_TIMEZONE=Asia/Taipei
- AGENDAV_LANG=en
- AGENDAV_LOG_DIR=/tmp/
- TZ=Asia/Taipei
networks:
baikal_net:
ipv4_address: 172.22.22.92

volumes:
config:
data:
db:

networks:
baikal_net:
external: true
name: baikal_network`

[mailliwal]

Succeed to deploy baikal, mariadb & agenDAV.

Once logon with created user in AgenDAV, "Internal Server Error" showed.

Otherwise, below msg showed for AgenDAV.
"AH00558: apache2: Could not reliably determine the server's fully qualified domain name, using 172.22.22.92. Set the 'ServerName' directive globally to suppress this message"

What should I fix it ?

Thanks