Cannot access the chat

I'm approaching the end of day one in a four-day course on GTW but have been struggling all day to find out how to access a text window in the Chat tab...?! Also, apparently the team can't see my questions in the Questions tab (which does have a text window as opposed to the Chat tab). I contacted the organizer's support team and was advised to try another browser, delete browser extensions, and exit and re-enter, but nothing helped. Finally, I tried to download the GoTo app for desktop (Instead of just clicking the link provided by the organizer), but for some reason I keep getting a "something went wrong" message when I try to sign in. So, I'm pretty desperate by now, having paid a substantial amount of money for the course and not being able to interact with the speaker and the team along the way and in the Q&A sessions.

Can you help me, please?