Since it is giving you trouble, on step 8, instead of answering No, I did not have coverage to Were you covered by a HDHP in 2021? instead answer, Yes, I was covered by an HDHP during at least one month during 2021 and then I had different plan types at different times of the year.
This will take you to a screen where you select your plan type for each month in 2021. Select None for every month, then select Calculate Max Contribution Limit and Continue.
Hopefully, that will clear the error you're encountering.
