Magic Home LED strip Connector not working

I have bought two separate 5 M led strips which I wanted to use with my amazon alexa. I bought a Duel Smart WiFi LED Controller RGB Strip Light App. When I connect both led strips to this, only one lights up, the other has a very faint glow- almost unrecognisable. I’ve tried swapping these around however this paticular LED strip won’t work. I therefore bought a new led strip & the same thing is happening. When I connect a second set to the adaptor, it doesn’t work & just shows a dim light. The wifi controller I’m using is the DV5-24v Wifi controller.

Please could someone assist how to fix?