Hi, I quick search for ‘Ensure condition failed: !FPackageName::IsShortPackageName’ brought me here, which suggests that there may be an issue with a package.
The errors before at the end of the log, these here
LogCook: Warning: Failed to move path 'C:/Users/Joxxxd/Desktop/mystic_world/Saved/Cooked/WindowsNoEditor' for async delete (LastError == 5); falling back to synchronous delete.
ProcessResult.StdOut: LogCook: Warning: Failed to asyncdelete directory 'C:/Users/Joxxxxd/Desktop/mystic_world/Saved/Cooked/WindowsNoEditor'. LastError == 32.
ProcessResult.StdOut: LogCook: Display: Sandbox cleanup took 1.413 seconds for platforms WindowsNoEditor
ProcessResult.StdOut: LogCook: Warning: Unable to find package for cooking /Game/GenericRadialMenus/Blueprints/BP_GRMGameMode
ProcessResult.StdOut: LogCook: Warning: Unable to find package for cooking /Game/GAME/Behemoth_island/weapons/elementBlades/BP_elementBlade
ProcessResult.StdOut: LogCook: Warning: Unable to find package for cooking /Game/GAME/Behemoth_island/Interactive/Ladder/Ladder
…suggest that there is a problem with deleting the temp folder content. This can happen when you have a file still open from these folders. Perhaps check this, also delete the content of the Saved/Cooked/ folder.
Also, if you say you deleted content, perhaps not correctly, something in the project appears to still look for
If you deleted it from the explorer, perhaps it is still inside the RecycleBin, restore these files, othewise it could be inside the saved folder, or perhaps you have a backup.