Teams alternative?

HotCakeX no laughing at all, you seen the stats for my little pro, it works fine for what i bought it to do, and i live paycheck to paycheck so buying a slightly better 1 was not an option, and yes the first 2 errors are from the support community, i was trying to check my messages and i get an error "You do not have sufficient privileges for this resource or its parent to perform this action", its a website, how can i not have sufficient privileges to check my own messages, the other is why i'm looking for 3rd party software that actually works, we both know that if i try to down office 365, 70,000 (exaggerating) software programs are going to come with it and that's going to be the end of my little pro running stable, the web version doesn't work for some reason, i've tried to run it in all 4 major browser IE, Chrome, Edge, and Firefox, to get the same problem with the very basic troubleshooting, dumping out cashe, clearing cookies, running up dates, the usual, now i have a team meeting today that i have to watch at 1:00pm eastern time any i don't have a working team program, 3 days of searching and i cant find anything, web version won't connect, i downloaded countless programs just to see if something else would run and let me join a teams meeting and i've gotten nowhere and i've asked if we could use cisco and got told that the company decided to buy the office 365 and teams was included and that what the teams meeting supervisor was using, office 365 is NOT going to run on 500 megs of ram and most likely is not going to install the 7 gigs of drive space that i have left, so i have 5 hours to find a solution that i spent 3 days looking for so i'm most likely not going to be able to watch this teams meeting which is very important for my job...