Error message in Modules

[dmagic]

I have been setting up gift certificates today but now I have this error message in Modules > Order Total

Fatal error: Call to a member function format() on a non-object in /home/mydatabase/public_html/includes/modules/order_total/ot_gv.php on line 49

I don't even remember opening this .php file and I have no idea how to fix it. Can anyone help, please?

[DrByte]

That suggests that you've changed or altered the /your_admin_folder/includes/init_includes/init_currencies.php, or you've added an altered version of it at /your_admin_folder/includes/init_includes/overrides/init_currencies.php

And/or you've changed /your_admin_folder/includes/classes/currencies.php

Put back the original version of those files, or figure out why you've changed the files in a way that breaks currency handling in the admin.