error_code	Description
Common	param_error	The requested parameters are incorrect.
	no_permission	No permission.
	first_login	First login, force to set a password.
	part_failed	The parameters of some channels fail to be saved.
	no_support	No support.
	frequent_operation	Operate too frequently.
	passwd_expired_login	The password has expired and needs to be changed.
	default_failed	Failed to restore default values.
	token_generation_failed	Failed to generate token.
	token_invalid	Token is invalid.
	device_busy	The number of requests being processed by the device reached the upper limit.
	user_expired_login	Account login expired.
	data_saving_busy	The device is busy saving.
	user_locked_login	The user login is locked.
	function_busy	Function busy.
	network_port_conflict	The network port conflicts
	group_name_error	The group name is incorrect.
Session	no_login	Not logged in.
	expired	Login expired.
	one_IE	Only one user can log in to a browser.
	logout	Log out.
	login_at_other	This account has been logged in at another location.
	device_reboot	Device reboot.
	passwd_expired	Passwd expired.
	param_changed	Parameters have changed.
	network_changed	The network port is changed.
	ssl_error	SSL certificate reissuance.
	netip_limited	The logged IP address is added to the blacklist.
	forced_offline	Forced logout.
	user_expired	User has expired.
	no_heartbeat	Heartbeat timeout.
	disk_changed	The hard disk status or parameters are changed.
	ipc_state_changed	On the IPC upgrade page, the IPC upgrade status has changed.
	have_login	The number of current logins exceeds the maximum value.
Secondary certification	current_pwd_error_ntime	If the number of authentication failures exceeds the upper limit, "remain_locked_time" is included in the "data", indicating the remaining lock time.
Save parameter	save_failed	Failed to save parameter.
	pwd_weak	The complexity of the IPC password is too low. (IPC)
	modify_failed	Modification has failed.
	modify_failed_pwd_err	The user name or password is incorrect when changing IPC's IP address.
	modify_failed_syntax_err	A format error occurred when the IPC IP address, subnet mask, or gateway was modified.
Search	search_failed	The search has failed. "data" will contain "remain_locked_time", indicating the remaining lock time.
Playback	device_play_locked	The device is playing back and rejecting the web request.
Operation	operation_failed	Operation has failed.
Modify the user name, password, and permission	session_invalid
	illegal_request	Illegal request.
	overreach	Subusers can only set their own information.
	short_modify_time	The interval between password changes is too short.
	current_pwd_error	Password error.
	username_empty	The user name is empty.
	username_repeat	The current user name is the same as the existing user name.
	username_invalid	The user name can only contain letters, digits, and underscores.
	unmatched_pwd	The two passwords are different.
	pwd_empty	The password is empty.
	pwd_length_err	Password length error.
	pwd_equal_name	The password cannot be the same as the user name or the user name typed backwards.
	pwd_equal_old	The new password cannot be the same as the previous passwords. "data" will contain "number", which represents the number of times.
	pwd_repeated	The new password must be different from the old password by at least two characters.
	pwd_weak_rule	The password must contain at least two of the following combinations: lowercase letters, uppercase letters, digits, special characters, and Spaces.
	pwd_risk	The password belongs to the weak password dictionary.
	pwd_invalid	Invalid password.
Email testing	user_auth_failed	User authentication failure.
	data_error	There are some errors in the data sent.
	net_unreachable_or_dns_wrong	The network is unreachable or the DNS is wrong.
	connect_server_err	Failed to connect to server.
	check_smtp_port	The connection failed. Please check whether the port is correct.
	tls_ssl_handshake_err	The TLS/SSL handshake failed.
	email_connect_err	Connection error, please check the recipient account.
Upgrade	in_user_interface	The device is in operation.
	updating	The device is being upgraded.
	lack_memory	The device lacks memory.
	file_error	File error.
	no_need_upgrade	The current version is the latest and does not need to be updated.
HTTP	not_modified	No modification. (304)
	http_redirect_https	http redirects to https. (307)
	not_found	Not found.(404)
	method_not_allowed	Request method does not allow. (405)
	payload_too_large	Payload too large. (413)
	uri_too_long	URI too long. (414)
	internal_server_error	Internal server error. (500)
	service_unavailable_error	The service is unavailable. The number of tcp connections exceeded the maximum. (503)