If you are trying to install TWRP (Team Win Recovery Project), an older TWRP build may not have been compiled with support for MT6768 or similar platforms. The recovery image expects a different CPU architecture or partition layout.
Provide these details when you file a report: platform mt68 not supported on this version work
As a last resort, consider changing your Android version: Feature proposal: Graceful handling for “platform mt68 not
Use Odin (for Samsung) or SP Flash Tool (for MediaTek) to clean-flash the firmware. Always back up your data first. If logs show packaging mistakes or missing binaries for mt68