Save Load objects

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I’am trying to save and load the position and rotation of objects, (not the player) an Actor Blue Print
And I get this error when I try to save the world transform and world rotation:

Play in editor start time for /Game/MyContents/Maps/UEDPIE_0_m0 -0.323

Blueprint Runtime Error: Accessed None trying to read property Class2 Save from function: ‘DemopSave1’ from node: Set Class2Rot in graph: DemopSave1 in object: InGame with description: Accessed None trying to read property Class2 Save

Blueprint Runtime Error: Accessed None from function: ‘DemopSave1’ from node: Set Class2Rot in graph: DemopSave1 in object: InGame with description: Accessed None

Class 2 is a Blue Printo objects I’am trying to save.