This does not happen often In fact this is the second time in 5 years.
Here is the crash log from Windows, It may point to something.
Source
ZwiftApp.exe
Summary
Stopped working
Date
5/28/2020 5:44 AM
Status
Report sent
Description
Faulting Application Path: C:\Program Files (x86)\Zwift\ZwiftApp.exe
Problem signature
Problem Event Name: BEX64
Application Name: ZwiftApp.exe
Application Version: 0.0.0.0
Application Timestamp: 5eab4e52
Fault Module Name: nvoglv64.dll
Fault Module Version: 26.21.14.4587
Fault Module Timestamp: 5e879b16
Exception Offset: 0000000001000f9d
Exception Code: c0000409
Exception Data: 0000000000000007
OS Version: 10.0.18363.2.0.0.768.101
Locale ID: 1033
Additional Information 1: fb0c
Additional Information 2: fb0c1126756e4d441f3c0e8ec3ac9b06
Additional Information 3: 7cdc
Additional Information 4: 7cdcfb8c5517ebe21a9f0062d8eb41e1
Extra information about the problem
Bucket ID: 66396e544f3a7eb5fae0ab2d7ff7143a (1936736051678090298)
I see the problem.
You were on zwift too early. Computer wanted a sleep in.
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I guess your computer needed a day off.
That DLL file suggests your GPU in some way. Are you running multiple monitors? Is threaded optimization turned off? Recently changed your driver or applied an overclock? Just a few questions I’ve seen dotted about in relation to that DLL and games crashing.
Wait look at that exception data. That’s a bond issue…James Bond.
(Sorry, can’t help myself)
Thanks @Dave_ZPCMR for looking at this.
On thing I changed recently is I changed Vertical sync to ‘Adaptive’. But I have ridden a few times after that change with no issue.
LOL that was after a 30min warm-up 
Looking at your recent post on ZPCMR, you’re actually running a quite recent driver. If you updated that from a very old one, perhaps it could do with a clean install. Have a Google for DDU.
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PC was rebuild recently March time frame. I keep my drivers updated I check for updates weekly. I updated the GPU drivers today (after riding today).
But a clean install of the GPU drivers can’t hurt.
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Looking at the release notes for the Latest Nvidia driver.
If it can impact F1 2019 it could probably impact Zwift.
@Dave_ZPCMR I just did another ride and all was well and good. Lets hope this was just a gap in the matrix.
