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Failed to identify private key location for Root Certificate

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ImBlank
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ImBlank asked on 27 Feb 2021, 10:02 PM

 

Hey, it seems like my Fiddler can't capture HTTPS as I try to install the Root Certificate I get an error in the Logs.

Doesn someone know how to fix it? I already deleted the RSA key multiple times.

 

-= Fiddler Event Log =-
See http://fiddler2.com/r/?FiddlerLog for details.

22:58:45:4179 Fiddler Running...
22:58:45:4229 Windows 8+ AppContainer isolation feature detected.
22:58:53:4077 Assembly 'C:\Users\MyName\AppData\Local\Programs\Fiddler\CertMaker.dll' was not found. Using default Certificate Generator.
22:58:53:4167 /Fiddler.CertMaker> Using .‰+˜ for certificate generation; UseWildcards=True.
22:59:02:5124 /Fiddler.CertMaker> Failed to identify private key location for Root Certificate. Exception: System.Security.Cryptography.CryptographicException Der Schlüsselsatz ist nicht vorhanden.

22:59:03:1799 DefaultCertMaker: GetRootCertificate() did not find the root in the Windows TrustStore.
22:59:03:1809 /Fiddler.CertMaker> Caller was in ApartmentState: STA; hopping to Threadpool
22:59:03:1809 /Fiddler.CertMaker> Invoking CertEnroll for Subject: CN=DO_NOT_TRUST_FiddlerRoot, O=DO_NOT_TRUST, OU=Created by http://www.fiddler2.com; Thread's ApartmentState: MTA
22:59:03:4941 !Failed to CreatePFX: System.Reflection.TargetInvocationException Ein Aufrufziel hat einen Ausnahmefehler verursacht. < CertEnroll::CX509Enrollment::CreatePFX: Der Schlüsselsatz ist nicht vorhanden. 0x80090016 (-2146893802 NTE_BAD_KEYSET)
22:59:03:4941 /Fiddler.CertMaker> Finished CertEnroll for 'CN=DO_NOT_TRUST_FiddlerRoot, O=DO_NOT_TRUST, OU=Created by http://www.fiddler2.com'. Returning null
22:59:20:2703 fiddler.network.availability.change> Network Available: True

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Nick Iliev
Telerik team
answered on 01 Mar 2021, 02:59 PM

Hi Baseult,

 

Apart from completely removing the certificates manually from the Windows certificate store, you could also try to disable any antivirus software or threat detection tool. Some of those tools are detecting Fiddler as MITM and assuming that this is MITM malware.

Btw, is that a new Fiddler installation on that PC or an existing one that stopped working?

 

Regards,
Nick Iliev
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