I have this issue :
Zwift encountered a communication error. If the problem persists, please contact Zwift Support with the error code ZLM06. Would you like to go to Zwift Support now?
network is ok restart my pc = ok
Many thx
christophe
Here the same issue.
No biking 
I did the update two days ago of my zwift app. Today trying to log in, doesn’t work plus im getting a message zlm06 on my macbook air laptop. So i cannot workout and i have no idea of what to do next?
Where do you guys live? It could be an issue with an ISP.
In geneva area
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also have a macbook air
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Hey all tried gain and it’s working again. Many thx for the response
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Ok, the other 2 don’t live in that area.
Could be a DNS issue.
For Mac: https://help.dreamhost.com/hc/en-us/articles/214981288-Flushing-your-DNS-cache-in-Mac-OS-X-and-Linux
For PC: Open a Command prompt and enter the following command: ipconfig/flushdns
You could also try a different DNS server(s). I would suggest Googles as a test: 8.8.8.8 and 8.8.4.4
Live in Belgium
And i know nothing about DNS … 
Don’t like to use Google server(s)
Try it again, it could have been a short hiccup in the matrix.
Hooray!
By starting the app, i get a update.
Everthing seems to work!!
THx Paul!
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Same problem persists here. I’m getting the error that Zwift can’t connect and I have to check my network connection. However, it’s working fine.
This was caused by the update I just installed today.
I’m on a Macbook Pro.
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Getting this error right now. I’ve restarted my MacBook Pro, reset the DNS, changed wifi networks, and nothing has worked. Any ideas?
Getting this now as well. I have done all the same steps as SW_Hammond and like him have had no luck with it working. The app was literally working 2 days ago.
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I can connect on my iPhone–not an ISP issue.
Same error over and over on the MacBook Pro. I do not believe there have been any OS updates, or Zwift updates. I logged in yesterday without a problem.
Hi there, same here ir Argentina. Also, on a MacBook PRO. I dont recall having any updates yesterday (last time i used Zwift)
Try this link and see what it look for the results in the US-West-2 region (Oregon) (you should get all Green check marks if successful): http://ec2-reachability.amazonaws.com/
Zwift Status: https://status.zwift.com/
Ditto in the UK. Logged on fine yesterday, can still log on Today via iPhone app on same wifi but not at all on macbook
I am getting the same issue. All fine on Monday when I rode last