Hello @LJain.1 and welcome to the Community :)
Trying to connect CubeMX with admin right.
Have a look at this post with same issue: trying to create a New CubeMX project...... downloading forever. Hope this helps you.
Otherwise, you can download the package via ST web page: STM32CubeF7.
Imen
When your question is answered, please close this topic by clicking "Accept as Solution".
Thanks
Imen
