I was not able to replicate your error, so I suggest clearing your cookies and cache to (How to clear your cache).
Alternatively, you can also try to use incognito mode (Ctrl + shift + N in Chrome and Edge browsers) , log into your return, and try again.
The 3 option in the 1099-SA section are: 1) HSA; 2) Archer MSA or regular MSA; 3); Medicare Advantage MSA