@TP-Link 1. the selected file is bin file not zip file. [Selecting the BIN file only] 2. please test on a different client. [Different client means ?] 3.back up the current configuration and reset...

@TP-Link I am also using the same model with same firmware version (1.4.0 0.9.1 v0001.0 Build 210601 Rel.32393n) and facing the same issue. I tried upgrading the firmware TL-MR100(EU) V1-build...