Crashing during game launch? [Windows] [November 2021] [1.19.0] [SOLVED]

Hi @shooj, I’m still receiving ‘Z117’ errors and can’t log on. Seems others are too.

Support ticket submitted and contacted by level 2 support but no luck so far. It’s been more than 3 days.

I would like some further assistance from Zwift with my problem.


I can confirm it works with my Dell XPS and the Geforce GT 550M on board

I received an e-mail from support that this graphic card is on the minimum side, noticed also that my laptop had 6GB RAM, if I could ugrade to 8GB RAM it would be better.

Donald Groen

This is demonstrably false.

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I have no issues previously, my PC dont have hardware nor software changes, internet connection is top notch, had enjoyed zwifting before introduction on Makuri Island, then updated with Makuri island. But with this latest patch, it keep on crashing and I cant zwift anymore, despite multiple un-install/ re-install/ delete registry/ delete zwift folders/ run as admin/ stop onedrive/ install on new laptop windows 10 etc. I’m on 2021-11 Cumulative Update Preview for Windows 10 Version 21H2 for x64-based Systems


Just got a Samsung S6 Lite tablet and the app crashes right after I add my Email and Password at the LOGIN page. Once I click NEXT, it loads for a few seconds, then crashes…BUT, when I change the Idiom from English to Spanish, for instance, it WORKS! Very odd…

Thanks to Zwift technical technical team continuous efforts in helping me to solve my issue vie email, which from their explanation on cached data, it trigger me to change my DNS from google to cloudflare (which claim to provide private connection).

And now, the patch downloaded swiftly, and I’m able to log in to zwift program without the program crash.

I have had the same issue since the update went live last week with no help from the Zwift support team other than to say it’s a bug that may be fixed at some point.

Do you mind posting in the explanation they gave you and some details on your DNS change

Finally managed to install 1.19.1 after a week of Z117 errors.

Zwift support could not identify the problem.

The fix came by connecting my PC to my mobile phone as a hotspot and 1.19.1 installed fine.

Not sure why Zwift would not update on my own network. My network has never had this problem before.

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Same. Update process failed multiple times. After turning off VPN and Virus-Protection and completely re-installing Zwift in Admin-Mode, I finally managed to finish the installation + update. Unfortunately, the App now crashes upon startup and became unusable.

Windows 10 Pro - 64 Bit
NVIDIA GeForce RTX 2070 Super
Driver: DCH 471.41

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I am currently unable to log in or complete updates with any of my Windows devices. I first notice the script error on my surface pro with windows 11. Then I tried my other systems that used to work with zwift. They all asked for updates which took forever to update, and the only one I managed to upgrade refused to login.

Apple is still working adequately

Every time I load Zwift on my Windows 10 computer with Intel graphics card the screen goes black. I have to restart my computer a few times before it work. Ironically, I almost missed Eric Min’s Thanksgiving Day ride because of it. I am amazed this has not been fixed yet as it has been what 10 days so far.

It is much more than 10 days, there are (known) issues with Intel iGPUs. Some users had solved the issues with downgrade to old drivers, try to search in forum.


New version 1.19.2 is said to fix the login problem on Windows and the Z-code problem too.


Today’s release v1.19.2 resolves the Z117 error code during launch. Would you update and let us know that’s cleared up for you?


Just updated and using Zwift now.

Seems to be working.

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The same problem

just reporting it is not working for me :frowning:

seems to be stuck at [16:20:44 2021-11-30] Launcher: Checking for VerCur Override

[17:55:59] NETWORK:error (6) sending player state

[17:55:59] NETWORK:error (6) sending player state

[17:55:59] NETWORK:error (6) sending player state

[17:55:59] NETWORK:error (6) sending player state

[17:55:59] Starting critical power curve search job (40788805) mTimeStamp = 23.31000 m_lastSearchTime = 23.31000 calculating=false

[17:56:03] ANT : Could not assign channel 0 to network 0

[17:56:04] NETCLIENT:[WARN] Auxiliary Controller failed to shut down tcp socket: ‘Eine Anforderung zum Senden oder Empfangen von Daten wurde verhindert, da der Socket nicht verbunden ist und (beim Senden über einen Datagrammsocket mit einem sendto-Aufruf) keine Adresse angegeben wurde.’ (10057)

[17:56:04] NETCLIENT:[INFO] Auxiliary Controller failed to connect to socket: ‘Der E/A-Vorgang wurde wegen eines Threadendes oder einer Anwendungsanforderung abgebrochen.’ (995)

app crashes - no response

3 posts were split to a new topic: Zwift crash while loading Makuri Island,