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Unable to open COM port, BQ76PL455-GUI

Hi,

I created my own board with BQ76pl45aa processor similar to BQ76PL45AAEVM. 
Bq76pl455a responds if I send a single command, but I cannot communicate via the BQ76PL455_GUI application.
Previously, I was able to communicate with the board through the application, but I had to format the disk and now I cannot.
I have downloaded the newest FTDI drivers and the installation was done according to the instructions.
Before creating the thread, I read other people's solutions (e.g. changing the port number, changing the wire, but it did not help).