Errors when working with TON Bridge tools

[xlabtg]

What do you think this error means?

ERROR: [plugin:ton-bridge] ton_bridge_open failed: OPERATION_FAILED: Failed to send message: The first argument must be of type string or an instance of Buffer, ArrayBuffer, or Array or an Array-like Object. Received undefined
ERROR: [plugin:ton-bridge] ton_bridge_custom_message failed: OPERATION_FAILED: Failed to send message: The first argument must be of type string or an instance of Buffer, ArrayBuffer, or Array or an Array-like Object. Received undefined
ERROR: [plugin:ton-bridge] ton_bridge_about failed: OPERATION_FAILED: Failed to send message: The first argument must be of type string or an instance of Buffer, ArrayBuffer, or Array or an Array-like Object. Received undefined