ailed to open map file. this is most likely because the map was saved with a newer version of the engine.

General Issues and Bug Reporting
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I have tried to load up my project and all it says is ‘Failed to open map file. this is most likely because the map was saved with a newer version of the engine.’ after that it tells me to ‘Project MyProjectC is broken because it’s missing its GameFeatureData. Do you want to fix it automatically?’ but doing this changes nothing. Does anyone have a solution?

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Thank you for your report! Can you please re-post using the “New Issue” option on the Issues and Bug Reporting forums? Posts with this feature are connected directly into our development team so we can quickly get to them!
For more information, such as how to get the reference ID, please check out the article here: Using the Creative and UEFN Bug Reporting Form