Don’t worry! It is easy to solve.
There are main causes for “Device not open” error:
1.USB driver problem
Please operate follow the steps below:
Step 1: Check the connection with device and computer
Step 2: Check the USB driver version whether is V2.10.0
Then install FVDI USB driver again!
FVDI Driver free download link: http://www.fvdiobd.com/download/FVDI_DRIVER.zip
For your information, here is the video to solve SVCI 2018 “Device Not Opened” error clearly: