Fixes error from singleplayer player location not being instantiated · blocktest-game/Blocktest-MonoGame@0db4824

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Non-nullable field 'BlockUid' must contain a non-null value when exiting constructor. Consider declaring the field as nullable.

Non-nullable field 'PlayerIds' must contain a non-null value when exiting constructor. Consider declaring the field as nullable.

Non-nullable property 'AllBlocks' must contain a non-null value when exiting constructor. Consider declaring the property as nullable.

Non-nullable property 'AllBlocksSprites' must contain a non-null value when exiting constructor. Consider declaring the property as nullable.

'Widget.GridColumn' is obsolete: 'Use Grid.GetColumn/Grid.SetColumn'

'Widget.GridRow' is obsolete: 'Use Grid.GetColumn/Grid.SetColumn'

'Widget.GridColumn' is obsolete: 'Use Grid.GetColumn/Grid.SetColumn'

'Widget.GridRow' is obsolete: 'Use Grid.GetColumn/Grid.SetColumn'

Dereference of a possibly null reference.

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