Stryd's Race Power Calculator uses your past 90 days of running activity to estimate your recommended target power to race at. In some conditions, you may not have enough data:
Invalid CP in this case, you have not generated a Critical Power yet. Read more on Critical Power to better understand how we determine your CP and how to keep it up-to-date.
Not Enough Data in this case, you need more runs to calculate a race prediction. Stryd needs at least five runs to do so, though more runs, with a lot of variety and with a similar course profile, will yield the most accurate results.