If you see this error in SP Flash Tool:
If you are using Chrome, try Microsoft Edge or Brave. If you see this error in SP Flash
Android firmware packages (ROMs) are almost always distributed as ZIP archives. Inside every valid ZIP file, near the very end, there is a special marker called the . This tiny block of data tells extraction tools (like Android Flash Tool) where all the other file contents are located, how many files are in the archive, and where the central directory starts. This tiny block of data tells extraction tools
Encountering the error while using the Android Flash Tool can be incredibly frustrating. This error typically surfaces when you are trying to install a new build (like a Canary or Beta release) or flash back to a public version on devices like the Google Pixel. Clear browser cache or use a different browser (Edge/Brave)
Clear browser cache or use a different browser (Edge/Brave). Download the Full Factory Image and flash manually. Driver Mismatch Reinstall the Google USB Driver in Fastboot mode. Google Server Issue