Error ERROR Validation Error '.', hexadecimal value 0x00, is an invalid character. Line 1, position 1. HyperScienceSubmission/__MACOSX/HyperScienceSubmission/._SubmitFile.xaml

Hi,

i am getting the below error

Error ERROR Validation Error ‘.’, hexadecimal value 0x00, is an invalid character. Line 1, position 1. HyperScienceSubmission/__MACOSX/HyperScienceSubmission/._SubmitFile.xaml

Please help me to understand the cause and solution.
Regards,
Heena