When running the page in admin Settings >> Currencies Settings it puts an error "Unknown error type: [8] Undefined variable: html on" in the error logs.

The fix

Open admin/currency.php and on line 26 find code
PHP Code:
$system->check_mysql($res_, $query, __LINE__, __FILE__); 
Directly bellow it add code
PHP Code:
$html = ''; 
as usual I will add this to the service pack and main download