The operation's base length must be equal to the string's length. error

Hello,

I am using codimd in docker from Linuxserver.io (latest) and I suddenly got the error in the title of the issue when I try to edit any of my notes while they were fine the other day and nothing has really changed.

I have attempted to fix it by updating the container and changing the defaultUseHardbreak setting to false. This didn't solve it.

**docker-compose.yml:**
```
version: "3"
services:
codimd:
image: linuxserver/codimd:latest
container_name: codimd
restart: always
volumes:
- ./config:/config
environment:
- PGID=2009
- PUID=2009
- TZ=Europe/Amsterdam
- CMD_DB_URL=mysql://codimd_user:supersecretpassword@db.docker.local:3306/codimd_db
networks:
web-int:
ipv4_address: 192.168.188.9

networks:
web-int:
external: true
```

**config.json**
```
{
"use_env_variable": "CMD_DB_URL"
}
```

**Logs:**
```
codimd | 2020-01-30T10:10:39.093Z error: The operation's base length must be equal to the string's length.
codimd | 2020-01-30T10:10:40.707Z error: The operation's base length must be equal to the string's length.
```