The files types, sizes, and permissions look OK. Copernicus Sentinels POD Service File Format Specification gives details of the file name format for .EOF files. The format uses the underscore (_) to separate fields. For your files:
Option_V – Applicability Time Period <Option_V suffix> = _VyyyymmddThhmmss_YYYYMMDDTHHMMSS where:
* yyyymmddThhmmss is the Validity Start Time
* YYYYMMDDTHHMMSSis the Validity Stop Time
You should check these time periods against the error message to make sure you have a file the is valid for the required time.