Curl error 51: Cert verify failed: UNITYTLS_X509VERIFY_FLAG_EXPIRED

You guys should look into modern solutions like LetsEncrypt. The fact that things like this can happen indicates a lack of a modern devops department. This does not inspire a lot of confidence tbh.

 

Unity reporting they pushed a fix. Seems fixed on my end.

Everyone else?

 

Take that back, error just changed to:

Curl Error: Empty reply from server

 

Go offline.

 

I'm facing the same issue on Unity 2019.2
Is it just an error or it would block some unity's functionality?

 

Same for me:

Code (CSharp):

1. Curl error 52: Empty reply from server

I think fix not fully works at this time.

Game build for standalone work fine.

 

ohhh, I think that's mean unity's server is down.

 

same. Different error same result. Still crashes my editor.

EDIT:
it's intermittent though.

 

It seems that the error is gone. Nothing happening in my project now. Everything is ok.

 

Hi All,
The certificates have been replaced and everything should be back to normal now, or in a few minutes until some cache servers are reset.
Sorry for the trouble.

 

Until the next time it happens. What was this? Why did Unity need to connect somewhere?

 

Can we get a postmortem on this issue? A lot of us would like to know how and why this happened. Thanks.

 

yeah, not only in unity editor, even my already built application from last week also fired this curl 51 error when I check the log with adb log on my device

 

As already mentioned: What was this? Why did Unity need to connect somewhere?

 

The sound of crickets is deafening.

 

There really needs to be full disclosure of what data you're collecting, how it will be used, whether it only applies to the editor, or dev builds, or release builds, which build platforms, and most importantly, how we can opt out of it.

 

It shouldn't be too hard to put an SSL proxy between the Editor and their services and analyze the content of those messages. Judging by the fact that we started getting these errors I'm guessing they aren't cert pinning so the only concern would be if it somehow violates terms of service or something like that. Given how progressive they sound from https://unity3d.com/security though it's probably fair game

 

All that leaves us is the feeling of having unknown data be send to an unknown server for an unknown reason...
Would be nice to clarify this issue.

 

Now the error is Curl Error 52: Empty reply from server

 

That's worrying. Did you use Unity Analytics, IAP etc.? I guess with all those Unity Services so deeply integrated into the engine it is unavoidable to send some data (not implying that I like that very much).

The more pressing question for me is: Did it impact your published game?
Was the game a debug build? Did it crash or anything? Does IAP still work?

If such a thing happens then I expect Unitys code on the client side to fail gracefully. What errors should we listen for? Can this be handeled with Exceptions? From what I hear the timing of the error seems pretty random.

Would be nice if someone from Unity could give some answers to that. Let's look for solutions and prepare for similar future events ('cause they will happen).

 

Whatever code Unity uses to report to the mothership everytime we try to enter play mode crashes the editor if you have "pause on error" enabled and the request fails. It caused constant crashing while connected to our company's VPN, so I had to revert to keep an eye on the console for errors.

 

@Charles_Beauchemin
Hello, I had the error yesterday on my build, today everything is fine.
But i wonder, why does my unity build needs to comunicate with the Unity servers ??
Is that a kind of backdoor or something ?
Before it happened yesterday i was not aware of that hidden - for me at least - behavior.

@_geo__
Obviously, if it happens again, your distant server should generate an exception.

[EDIT] it still happens...

 

This is not resolved. As other have reported, now getting intermittent errors:

Curl error 52: Empty reply from server

Not nearly as often as the Curl error 51, but I've had my project open now for 15 minutes and it's popped up 3x.

 

Change the name of the game.

 

Same for me, I keep having "Curl error 52: Empty reply from server" every hour or so.

 

The solution for me was to block Unity.app from connecting to pubsub.pubnub.com

 

I think they fixed it.

 

Still getting "Curl error 56: Receiving data failed with unitytls error code 7" What's the deal Unity?

 

Still no news about why the curl is curling ?

 

Maybe someone at Unity really misses the winter Olympics.

 

UNITY ADS NOT SHOW ANYMORE

 

Any one else still getting an error?

 

I keep having "Curl error 52: Empty reply from server" every few hours or so.
Since Unity announced that they fixed it yesterday, I am not 100% sure if it's related, but in play mode, Unity crashed and shut down several times without any reason since yesterday... which never happened before.

 

Same here url error 52 lastest LTS version.

 

Has anybody tried to get answers from Unity on a different way of communication and already got some response which can be published here?

 

On Friday there was Curling:
Curl error 51: Cert verify failed: UNITYTLS_X509VERIFY_FLAG_EXPIRED
Curl error 51: Cert verify failed: UNITYTLS_X509VERIFY_FLAG_EXPIRED
Curl error 51: Cert verify failed: UNITYTLS_X509VERIFY_FLAG_EXPIRED
NotSupportedException: System.Reflection.Emit.DynamicMethod::.ctor
at System.Reflection.Emit.DynamicMethod..ctor (System.String name, System.Type returnType, System.Type[] parameterTypes, System.Type owner, System.Boolean skipVisibility) [0x00000] in <00000000000000000000000000000000>:0
at Newtonsoft.Json.Utilities.DynamicReflectionDelegateFactory.CreateDynamicMethod (System.String name, System.Type returnType, System.Type[] parameterTypes, System.Type owner) [0x00000] in <00000000000000000000000000000000>:0
etc.

*****************************************************************************

Today (Monday) the "Curling" is gone, but the exception still persists:

NotSupportedException: System.Reflection.Emit.DynamicMethod::.ctor
at System.Reflection.Emit.DynamicMethod..ctor (System.String name, System.Type returnType, System.Type[] parameterTypes, System.Type owner, System.Boolean skipVisibility) [0x00000] in <00000000000000000000000000000000>:0
at Newtonsoft.Json.Utilities.DynamicReflectionDelegateFactory.CreateDynamicMethod (System.String name, System.Type returnType, System.Type[] parameterTypes, System.Type owner) [0x00000] in <00000000000000000000000000000000>:0
etc.

 

I tried 2019.2.8 - the problem persists.

 

Actually I dont use unity IAP or unity analytics, but turns out its there on the package manager by default.
Its not a debug build, but fortunatelly it didnt crash my app, just firing that error every several seconds

 

Okay, that sounds tolerable. Thanks for letting me know.

 

Hi Charles,
I understand how this was happening however as a number of people have already requested, we would like to know why this was happening?
I could understand the Editor connecting to a server for analytic purpose but why did my (development) build also show this same error.

Thanks.

 

So yeah, it appears Unity’s trying to sweep things under the rug. I should have expected it by now.

 

I am gathering the info and will get back to you shortly.

 

Any news or solution anyone?

Similar curl here for MacOS build: Curl error 51: Cert verify failed: UNITYTLS_X509VERIFY_FLAG_NOT_TRUSTED

I'm on Unity 2019.3.13. Tested on MacOS Mojave 10.14.6. Works fine on Editor PC and Mac, builds for UWP and Standalone.

I confirmed azure host where unitywebrequest is going has certificate.
I checked the project with Fiddler and built project only seems to handshake with host on tunnel, I can't see Multipartformdatasection fields exchanged.

I created a fresh test project and tested the same url unitywebrequest. Worked fine. Then run fiddler in parallel and got the same Curl error above.

 

Hi Tarrag, you are getting this error today? I was told everything was resolved and the expired certificate was replaced. You seem to be encountering a new error but I can't tell which server you are trying to connect to. Are you seeing this in the editor or your compiled game?

 

Hi all,
Thank you for raising your concern to Unity. Please rest assured that all you saw in the error message was a hiccup on our end to our normal and previously disclosed data collection. We had a certificate expire that interrupted our ability to collect the data, and you were seeing that error message. Please remember Unity provides you with a place to order data reports to see the data that we collect about you and an ability to turn off certain data collection. You can visit the "privacy" page in your account and order reports as well as change your Editor collection settings. All Unity developers may exercise these rights regardless of their license type (e.g. Pro and Personal alike). As a reminder, the usage data we collect is aggregated and anonymized, and we use it to improve and maintain our software product that you license. We do not sell this information or profile you in any way individually. We deeply respect your privacy rights, and we hope the tools we have put in for you to exercise your rights are helpful to you both in getting your data reports and in being comfortable with our data privacy practices. Thank you. If you have further questions, please write to dpo@unity3d.com.

 

Hi @Charles_Beauchemin , thanks for keeping an eye.

I'm connecting to an azure server, I've sent you the domain to the email address you've posted dpo@unity3d.com.

I confirmed azure host where unitywebrequest is going has a valid certificate.

I'm on Unity 2019.3.13. Tested on Windows 10 and MacOS Mojave 10.14.6. It works fine on Editor PC and Mac, it also builds fine for UWP and PC Standalone. It only failed on MacOS compiled build which is what we're due to release next week, any interim work around much appreciated or will fail the release.

 

Can you give me more details on this host? We don't use any Azure servers at Unity.

 

no worries, we've found the issue lied on fiddler firing the curl error and newtonsoft.json corrupting our request on macos only, thank you for your help.

 

Does it means even with everything disabled, you still send informations from a build to your server ?
Are we sure this comply with the General Data Protection Regulation laws when releasing a game for the European market ?