While you are signed into CourseCareers, you should be able to click the Community button on your Courses page. If not, try using the link below for your course path.
Tech Sales: https://discord.gg/DcKUc2D2BY
Digital Marketing: https://discord.gg/8ye9Sbaq4e
Customer Success: https://discord.gg/PSfAWUxz7J
If you are using Safari, connecting to Discord is a common issue people have that has nothing to do with CourseCareers. I Googled this issue and apparently, other people using safari on discord also had this issue. Safari Discord Issue
If you are still having problems, do you have another browser you can try? Otherwise, please contact someone at Discord for more help as this is most likely not a CourseCareers issue.