Deprecated Notice and Error afterwards

[maharzan]

i was testing this function and its showing me a deprecated notice
https://github.com/impress-org/givewp-snippet-library/blob/master/form-customizations/custom-fields-plugin.php

Notice: The give_after_donation_levels action is deprecated since GiveWP version 2.10! Use give_fields_after_donation_levels instead.

Once I use 'give_fields_after_donation_levels' instead, the whole form breaks away like this

I just want to add a field in the form.