: Use a ZIP checker tool to see if the archive is truly defective. If it's an .ofp file, ensure you have the correct version for your exact Realme model.
After downloading a clean, complete OFP file (verified by hash), the Realme Flash Tool loaded it without any “central directory” error. Flashing completed successfully.
The error means the OFP file is – specifically the zip-style central directory at the end of the file is missing.