Some data to help support your problem - it's a problem because I don't believe in issues/challenges and most other "management" speak. (Otherwise known as a me too post)
1. Was an update (to website) earlier and short downtime.
2. I'm seeing fine. (Firefox 66.0.2 64bit, Win 10, Firewall/anti-virus/password protection -> all fully up to date and working). 3. Posted test text on chatbox - 1652 GMT today 03/04/2019 - UK version as I'm not some foreigner or colonial (Sorry comrades)
Edit: I had the below problem but after rebooting the machine all is well now.....
I had the problem of the blank chat box.
I’m using Chrome.
I have the chat box back but now though I am getting the error:
Oops! We ran into some problems.
Cookies are required to use this site. You must accept them to continue using the site.
In the Chrome settings I have allowed sites to save and read cookies.
I can’t log out, I can’t log in and I can’t post. I'm using ME to post this.