Invalid Checksum Error when using Mega NZ

Maybe … it appears the error message originates from the Mega library:

Best I can understand, the error happens when the file is downloaded from Mega, but defect for some reason. If you get the same error repeatedly, maybe you can try downloading the file directly from Mega and see if it is broken?

When testing the restore, make sure you have --no-local-blocks set, otherwise Duplicati will use data from files on-disk to recreate the target files, which could hide problems with the remote data.