CCS/MSP432E401Y: Cannot open serial Port XDS110 Class Application/User UART

Tool/software: Code Composer Studio

Hey,

for some reason I cannot open the serial port of the Launchpad on my PC.

I loaded the uart_echo_MSP_EXP432E401Y_nortos_ccs example and use PuTTY to access the serial Port. On my laptop it is working well, but on my other PC I get following error message from PuTTY:

Did I forget do install some drivers? CCS v.9. is there and I can load the uart_echo program to the MSP432 Launchpad from the PC.

Thanks for your help!

best regards

Tiemo