Save Config Button for setting currency under system / configuration will not work
Re: Save Config Button for setting currency under system / configuration will not work
Clear your browser's cache and cookies, and try again.
Disable any third-party extensions or customizations that you may have installed, and try again.
If you're not comfortable debugging the code yourself, you may want to consider hiring a Magento developer to help you resolve the issue.
I hope this helps! Let me know if you have any other questions.