failed to install chromium extensions

[kkisbug]

my docker-compose.yaml:

version: "3.4"
services:
neko:
image: "m1k1o/neko:chromium"
restart: "unless-stopped"
shm_size: "2gb"
ports:
- "8080:8080"
- "52000-52100:52000-52100/udp"
cap_add:
- SYS_ADMIN
environment:
NEKO_SCREEN: 1920x1080@30
NEKO_PASSWORD: neko
NEKO_PASSWORD_ADMIN: admin
NEKO_EPR: 52000-52100
NEKO_ICELITE: 1
NEKO_NAT1TO1: 127.0.0.1

everything goes fine, except when I try to install chome extensions, it says "Your admin has blocked this item (ID: kjacjjdnoddnpbbcjilcajfhhbdhkpgk)",

WHAT CAN I DO?