Any time I try to open my anki deck, it says “invalid params”. I have tried restarting my laptop, downloading a new version of Anki. Can someone help me with this?
- Go to the Options for that deck/subdeck.
- Delete your FSRS parameters.
- Click Optimize to get new parameters and Save.
Thank you so much!!
It would be a good function, if Anki, instead of the warning dialog “invalid params”, showed a dialog: “invalid params, correcting…” and recalculated the params automatically.
OK, I can answer myself 
[quote=“dae, post:3, topic:36715”]
Automatic rebuilding is unlikely to happen, as that would result in all cards being marked as changed without any user interaction, and could cause the user to lose progress if they weren’t fully in sync when it happened.
[/quote]
In this case, it should be communicated in Help that it is better to be fully synced on all devices before optimising parameters.