Invite Member button is not working

Here I am invite my fellows to our organization. after selecting his ID, Invite button still disable or not working. Any one have any idea what is wrong with it

When the user shows up in the blue dropdown, you still have to click on the shown user for your choice to become effective, in fact you can see the + button in the proposed user — the fact that the screenshot is still showing the suggested user means it wasn’t picked yet.

This is commonly caused by browser extensions, as it was the case this time. Thank you for raising this!