unprotect sheet in calc

I am unable to unprotect anything in calc. Not the file, not the sheet and not the cells. Every option I try that allows me to select what I want to unprotect does not allow me to save the action.

What did you actually try to save one of the files in mind ‘Without Password’ (unencrypted)?
What did you already try concerning the protection of sheets/cells?
What do you mean, exactly, by “save the action”?
In what way did it get obvious that your attempts failed?
You have enough karma to attach a file you experience the issue with.