Not letting me send anything

My send button is not working. I can type in the box but whenever I try to send it, the button just loads. I started getting this problem since yesterday. I thought it would go away with time but when I checked today, I am still having the same issue. I saw another post with all the tips and tricks. I tried everything but it is still not working for me.

Also, I don’t think switching browsers and devices are helping because when I logged into another account on the same device and browser that I was using, it works completely fine.