Would it be possible to add a Code field for individual cash accounts that controls the order of their appearance in the Cash Accounts tab? All other accounts have this feature, settable under Chart of Accounts in Settings.
Users who number accounts according to typical 3 or 4-digit schemes might wish to also number their various cash accounts as subsidiaries of their respective control accounts. Often, of course, such schemes number balance sheet accounts in order of liquidity. Other criteria might also be used, such as frequency of use. Rarely would the current alphabetical order be the choice, but that could be left as the default for those who do not use account codes.
Could you show screenshot what you see after you click New Cash Account button in the business where Create button doesn’t work? It could give some clue what’s wrong.