Model\Ui\CapabilitiesConfigProvider: returns an empty array instaed of null when Installment payment method is disabled.
Model\Ui\CapabilitiesConfigProvider: returns an empty array instaed of null when Installment payment method is disabled.

According to an error from 'Magento/Checkout/Model/CompositeConfigProvider.php' line 38. Magento merges all of configurations from all registered config providers into one array.
The problem occurred when we disabled Installment patment method, our CapabilitiesConfigProvider returns null instead of an empty array, and that caused 'CompositeConfigProvider.php' trying to merge 'null' value with array_merge_recursive().

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