I have successfully connected my Raspberry PI 4B to MATLAB and Simulink once before by using the 'connect through wifi' option when installing the hardware support package. I ran 'mypi=raspi' and it showed that it indeed was connected. It was able to run a Simulink program with no issue. After I powered down the PI and later tried reconnecting it, MATLAB told me that the IP address, password, or username was incorrect - I have not changed from the defaults and am sure I was using the same IP address. Trying to run the same program, it gave me an error saying it could not connect to SSH. I checked my router and it displayed the PI in the 'connected' devices and not in the 'unconnected devices', but the RSSI level was undefined. I have tried reinstalling the support package for Raspberry PI and using different connection options, but now it won't allow me to connect again even through the wifi option as I had before. Any help is greatly appreciated.