Arduino board are missing after installation

iam try to install SquareLine Studio in my pc but after installation are complete in create option ther are no Arduino TFT_espi and esp32 board there are what is a problem

If only the destop option appears in the launcher, your computer could not connect to the Github website. Please check whether the website is working in your computer’s browser, or whether it is allowed to connect to SquareLine Studio’s external website or server.