Here is a for Handshaking... error unexpected response 0x68 .
: In web services, "Handshake" errors often occur when there is a mismatch between HTTP and HTTPS . For example, if a client attempts a standard HTTP connection with a server that strictly expects encrypted HTTPS, the initial response may be interpreted as an invalid or unexpected token.
Are you seeing this error while setting up a or while flashing a device via a serial port?