You can't lose your coins but I think you might need to post your problem at the Ledger sub-reddit for help from a developer https://www.reddit.com/r/ledgerwallet/

Others seem to be having the problem also see https://www.reddit.com/r/ledgerwallet/comments/6puo5m/ledger_is_having_errors_and_not_showing_latest/

Hope this helps!