fix(misc): fixes exception in localization manager with null strings

[Arik]

Before a73b6461c5b6222c8930ee114657aceaa1c349dc null strings did not throw an exception. For example, getting minerals in Exploration as the last reward should exit the scene after 5 seconds; however, the exception prevents that from happening.

[juh9870]

Thanks! I did not know that. Tho I will have to investigate why minerals have null strings later on