I need to make a colleague the Alternative host for a meeting. This is the message i get when i put his email into the OPTION: Alternative Host box  "Unable to assign "***********" as an alternative host because the user cannot be selected at this time"

I recently claimed host duties of a meeting to record it on behalf of the original meeting host. I was able to record the meeting (my settings are 'cloud recording'), but now I am not seeing the recording in my Zoom profile.

Am I wrong to assume that the recording should appear in my profile once it is compiled? 

Using Linux Mint Cinnamon current system.  I have installed the 5.13.....version of zoom.  I am sent a link to join a meeting.  I click on that link and the software opens and tells me that I need to upgrade as the software is not current.  I click on install (just in case my understanding is incorrect) and the green thing goes back and forth once I let it do that for an hour.....

Nothing happened and I still can't join a meeting.

I've tried uninstalling and re-installing and that hasn't helped either.  If I start zoom on my own it says that the version is as above, yet I still get the message to upgrade if I use the link.

If there is another way to join or use the software please inform.  Until getting an account I have been able (4 months ago) to join meetings now I can't.