Hello Matthew.

Sorry for the inconvenience.

Issues like this usually occur when there is a conflict either with the theme currently active on your website, or another plugin you have installed.

Can you please change the theme and see if the issue is resolved? If not, then please deactivate all other plugins except for wpDataTables, refresh the page where the issue is, and see if it is resolved (it should be). If it is, then start activating other plugins one by one, and after each activation refresh the page to see if the issue reoccurred. Once it does reoccur, you will have found the plugin causing the issue.

If that doesn't resolve the issue, there may be something wrong with the database.

Please provide me a temporary WP-admin login for your site where this happens, so we could log in and take a look ‘from the inside’ as that’s the most efficient way to see and resolve the issue. We do not interfere with any data or anything else except for the plugin (in case that’s a production version of the site), and of course we do not provide login data to third party. You can write credentials here just check Private Reply so nobody can see them except us.

Hello again Matthew.

Thanks for the credentials.

I noticed that there's a console error when I access the "Finance page":

And the response is:

{"message":"Number '1.0E+15' must be greater than zero"}

So, in file ../wp-content/plugins/ameliabooking/src/Application/Services/Reservation/AbstractReservationService.php

I modified line 344, and changed this:

if ($booking->getCoupon()) {
    $price -= $price / 100*
        ($booking->getCoupon()->getDiscount()->getValue() ?: 0) +
        ($booking->getCoupon()->getDeduction()->getValue() ?: 0);
    }
return $price;
}

To this:

if ($booking->getCoupon()) {
    $subtraction = $price / 100 *
        ($booking->getCoupon()->getDiscount()->getValue() ?: 0) +
        ($booking->getCoupon()->getDeduction()->getValue() ?: 0);
    return ((floor($price * 100) - floor($subtraction * 100)) / 100);
}
return $price;

But the issue was still there, so I commented line 27 here: ../wp-content/plugins/ameliabooking/src/Domain/ValueObjects/Number/Integer/PositiveInteger.php

and it returned the Coupons normally.

The issue here is that you set the usage limit to be greater than what's allowed in the code (9999999999999999999). I lessened it to 99999, and it is working fine now.

The issue has been forwarded to our developers, so they will add a limit at 1.000.000, and you shouldn't be facing this issue anymore.

The commented line is now back (uncommented), and everything is up and running. Please check, and let me know.