Because my PC is old, I have to use this adapter: M.2 NGFF to PCI-E Adapter Card, Bewinner M.2 NGFF to Mini PCI-E Adapter Notebook Wireless WiFi Bluet...
But it seems it doesn't work with Bluetooth. See the photo I attached. What should I do?
There is a third-party implementation of the AX200 card that is designed for the PCIe Mini Half Card slot on older laptops and PCs. Here is (NewEgg) link: https://www.newegg.com/derapid-mpe-ax3000h-mini-pci-express/p/0XM-02WM-00014.
Hope this helps,