The Tenda AC8 firmware is functional and stable for basic home use (browsing, streaming), provided you have the V4 or V5 revisions.
📥 Official source: tendacn.com
You downloaded the wrong hardware version (e.g., v2 firmware for a v1 router). Solution: Double-check your sticker. Download the correct file. If you are sure it is correct, clear your browser cache or try a different browser (Firefox or Chrome). tenda ac8 firmware