# Launching D5 from the D5 converter gives the error "default error".

![image](https://docs.d5render.com/~gitbook/image?url=https%3A%2F%2F3611830798-files.gitbook.io%2F%7E%2Ffiles%2Fv0%2Fb%2Fgitbook-x-prod.appspot.com%2Fo%2Fspaces%252F-MjbN1iGmN_HBnj_fyU9%252Fuploads%252FfvvS2IRUYhWv1HDahLJe%252Fimage.png%3Falt%3Dmedia%26token%3Db3cf1103-004e-4e36-b1bf-194ffccff802&width=768&dpr=3&quality=100&sign=5420831d&sv=2)

When the D5 client detects an abnormality in the network connection of the current device, it will prompt "default error".

Solution: Disable the firewall and the VPN, then sync again.