Download and install the MediaTek (MTK) USB Drivers and filter drivers with the dongle unplugged.
OnePlus 12, Nothing Phone (2a), and various Infinix/Tecno/iTel models. Installation and Setup Guide U-m-t Beta V2 -UPD-
To ensure stability, the UMT Beta V2 requires a specific installation sequence: Download and install the MediaTek (MTK) USB Drivers