To use the "Save Cloud Anchor" blueprint in UE5, but receive an error string "Failed to create azure spatial anchor: 82", it means that the Azure Spatial Anchor was not created successfully. This could be due to a variety of reasons, such as incorrect parameters or insufficient spatial data. It is recommended to check the parameters being passed to the function and ensure that there is enough spatial data to create the anchor. Additionally, it is a good idea to check whether the save call succeeded and retry if necessary.
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