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Failed to open map file.

Failed to open map file. This is most likely because the map was saved with a newer version of the engine.
i am just upgrade ue 4.11 to 4.11.2

Help please

it might of corrupted try finding the autosave or backups of the of the map in your ProjectName/Saved folder and moving it to your content folder where your maps are saved to try repairing it. its important to always keep backup especially when upgrading the engine