We have a known issue where imports of a CSV file will cause your account to give an error:
"The change you wanted was rejected. Maybe you tried to change something you don't have access to"
You'll see this error if you are attempting to import a CSV file with a Category Name that is already in your ledger.
Alternately, if that category name is an Income category, and you're importing it as an Expense category the same thing will happen.
The solution is to make sure that when you import a CSV file, your category names are unique and occur on only one side of the "Income" or "Expenses" section.