Help: I can't hear anything on the meetings (but the audio works on Youtube/spotify etc)

Since Thursday (04/25), I haven't been able to hear anything in the meetings. Apparently, I have sound on my microphone because when I test it, I see the bar recognizing my voice, but I can't hear anything. I even bought a new headphone, but it still hasn't solved the issue. I can hear audio normally in other places like YouTube and Spotify, but I don't hear anything on Zoom. Please help me because I rely on this platform for teaching. I've tried everything imaginable and nothing has worked.