Hi, if you have an active flight plan in the HSI you should see this:
And verify that you are in GPS mode by going to aids sub menu:
Another way to verify that you have an active F-PLN is to verify it on the WYPT page:
If those conditions are met you should be able to follow the flight plan:
We cannot provide for support here, you will have to visit our discord if you need help.
Regards.