Packaging failed!

Hello,
I am learning UE 4.26 but facing an error while packaging the game: PackagingResults: Error: Unknown Error
LogSlate: Took 0.045463 seconds to synchronously load lazily loaded font ‘…/…/…/Engine/Content/Slate/Fonts/DroidSansMono.ttf’ (77K)
I have also attached a photo of the output log!