When I select all user meta fields this plugin should export all the user data including standard users fields, users meta, users by role and now it does not export all data. Stored options and Advanced options do not work any more either.
Basically, core jQuery functions are not available, so other functionality cannot work – the cause of this could be in any of the themes or plugins you have installed or the set-up of the WordPress site itself.
If you are unsure how to dig deeper into this, perhaps you can speak to your hosting company to ask them to help you locate the issue – or if you built this site yourself, please try to disable and re-enable each plugin / theme and see at which points the problems start.
Also, please note that jQuery live function is deprecated – https://api.jquery.com/live/ – so your site also seems to be loading outdated code – perhaps you can fix this by updating some plugins / themes – if the authors have released more recent versions.