A connection parameter is incorrect. This is the most common case, where is everyone primary query.
2 Check if entered correctly matches the model
These two points are the most easy to check, but still often not connected to the MCU in this release
The reason is: MCU connection defaults to HTTP connection SMC,
The default mode SMC MCU is added by default encryption mode, which is the HTTPS mode is the default mode does not match the place we most easily overlooked