--- title: "Certificate Manager troubleshooting" slug: "certificatemanager-troubleshoot" updated: 2026-09-17T09:05:18Z published: 2026-09-17T09:19:55Z canonical: "guide.ncloud-docs.com/certificatemanager-troubleshoot" stale: true --- > ## Documentation Index > Fetch the complete documentation index at: https://guide.ncloud-docs.com/llms.txt > Use this file to discover all available pages before exploring further. # Certificate Manager troubleshooting Available in Classic and VPC This page lists problems you might run into when using Certificate Manager Service. Click on the error to see more details. ## Troubleshoot common issues The following are examples of common errors you might encounter: [Certificate deletion error](/docs/en/certificatemanager-troubleshoot-common#%EC%9D%B8%EC%A6%9D%EC%84%9C%EC%82%AD%EC%A0%9C%EC%98%A4%EB%A5%98) The certificate cannot be deleted when trying to delete and proceed again after selecting the wrong authentication method. [SSL certificate error](/docs/en/certificatemanager-troubleshoot-common#SSL%EC%9D%B8%EC%A6%9D%EC%98%A4%EB%A5%98) SSL certificate error has occurred. [The "net::ERR_CERT_AUTHORITY_INVALID" error message](/docs/en/certificatemanager-troubleshoot-common#netERRCERTAUTHORITYINVALID%EC%98%A4%EB%A5%98%EB%A9%94%EC%8B%9C%EC%A7%80) "net::ERR_CERT_AUTHORITY_INVALID" error message is displayed. ## Certificate issuance issue The following are examples of certificate issuance errors you might encounter: [Domain name error](/docs/en/certificatemanager-troubleshoot-issue#%EB%8F%84%EB%A9%94%EC%9D%B8%EC%9D%B4%EB%A6%84%EC%98%A4%EB%A5%98) A domain name error occurs when applying for certificate issuance. [Certificate is not issued](/docs/en/certificatemanager-troubleshoot-issue#%EC%9D%B8%EC%A6%9D%EC%84%9C%EA%B0%80%EB%B0%9C%EA%B8%89%EB%90%98%EC%A7%80%EC%95%8A%EC%9D%8C) The certificate has not been issued. [Error occurs when applying the certificate to the server](/docs/en/certificatemanager-troubleshoot-issue#%EC%84%9C%EB%B2%84%EC%97%90%EC%9D%B8%EC%A6%9D%EC%84%9C%EC%A0%81%EC%9A%A9%EC%8B%9C%EC%98%A4%EB%A5%98) The certificate cannot be applied to the server. ## Certificate compatibility issue The following are examples of certificate compatibility errors you might encounter: [Certificate compatibility issue](/docs/en/certificatemanager-troubleshoot-compatibility) If a certificate compatibility issue occurs, the following error message will be displayed. | Software | Error messages | Root certificate update or manual installation targets | | --- | --- | --- | | Google Chrome | NET::ERR_CERT_AUTHORITY_INVALID | - If the version is Chrome 105 or higher, the Chrome browser itself - If the version is Chrome 105, the operating system with the Chrome browser is installed | | Microsoft Edge | NET::ERR_CERT_AUTHORITY_INVALID | Operating system with the Edge browser installed | | Mozilla Firefox | SEC_ERROR_UNKNOWN_ISSUER | Firefox browser itself | | Apple Safari | A warning appears that the connected network is not private > **View certificate** > **Click on the top-level certificate**, and it shows "This root certificate is not trusted." | Operating system with the Safari browser installed | | Google Android application | `java.security.cert.CertPathValidatorException: Trust anchor for certification path not found.` | Android operating system | | JAVA application | `PKIX path building failed: sun.security.provider.certpath.SunCertPathBuilderException: unable to find valid certification path to requested target; nested exception is javax.net.ssl.SSLHandshakeException: PKIX path building failed: sun.security.provider.certpath.SunCertPathBuilderException: unable to find valid certification path to requested target` | JAVA TrustStore | ## External certificate registration issue The following are examples of external certificate registration errors you might encounter: ["The private key has been encrypted. Decrypt it with a pass phrase." error message](/docs/en/certificatemanager-troubleshoot-external#privatekey%EA%B0%80%EC%95%94%ED%98%B8%ED%99%94%EB%90%98%EC%96%B4%EC%9E%88%EC%8A%B5%EB%8B%88%EB%8B%A4passphrase%EB%A1%9C%EB%B3%B5%ED%98%B8%ED%99%94%ED%95%B4%EC%A3%BC%EC%84%B8%EC%9A%94%EC%98%A4%EB%A5%98%EB%A9%94%EC%8B%9C%EC%A7%80) A domain name error occurs when applying for certificate issuance. ["An error occurred while validating the certificate. Only one certificate can be entered in the certificate body. " error message](/docs/en/certificatemanager-troubleshoot-external#%EC%9D%B8%EC%A6%9D%EC%84%9C%EA%B0%80%EB%B0%9C%EA%B8%89%EB%90%98%EC%A7%80%EC%95%8A%EC%9D%8C) "An error occurred while validating the certificate. Only one certificate can be entered in the certificate body." error message is displayed. [The certificate is not valid](/docs/en/certificatemanager-troubleshoot-external#%EC%9D%B8%EC%A6%9D%EC%84%9C%EA%B0%80%EC%9C%A0%ED%9A%A8%ED%95%98%EC%A7%80%EC%95%8A%EC%9D%8C) A message that the certificate is not valid is displayed. [The number of domains that can be included in the certificate has been exceeded. (Maximum 300)](/docs/en/certificatemanager-troubleshoot-external#%EC%9D%B8%EC%A6%9D%EC%84%9C%EC%97%90%ED%8F%AC%ED%95%A8%EB%90%A0%EC%88%98%EC%9E%88%EB%8A%94%EB%8F%84%EB%A9%94%EC%9D%B8%EA%B0%9C%EC%88%98%EC%B4%88%EA%B3%BC%EC%9E%85%EB%8B%88%EB%8B%A4) "The number of domains that can be included in the certificate has been exceeded. (Up to 300)" error message is displayed. ["The public key certificate and private key pair mismatch" error message](/docs/en/certificatemanager-troubleshoot-external#%EA%B3%B5%EA%B0%9C%ED%82%A4%EC%9D%B8%EC%A6%9D%EC%84%9C%EC%99%80%EA%B0%9C%EC%9D%B8%ED%82%A4%EC%8C%8D%EC%9D%B4%EB%B6%88%EC%9D%BC%EC%B9%98%ED%95%A9%EB%8B%88%EB%8B%A4%EC%98%A4%EB%A5%98%EB%A9%94%EC%8B%9C%EC%A7%80) "The public key certificate and private key pair mismatch" error message is displayed. ## Learning resources We offer various materials for you to explore. To learn more about Certificate Manager, check out these helpful links: - FAQs: [Certificate Manager FAQs](https://www.ncloud.com/support/faq/prod?categoryCode2=SEC&categoryCode3=SV_0110&page=1) - The NAVER Cloud Platform blog: [Register, issue, and manage SSL/TLS free certificates all at once! Certificate Manager release](https://blog.naver.com/n_cloudplatform?Redirect=Log&logNo=223305508668&from=postView&trackingCode=blog_bloghome_searchlist) - The NAVER Cloud Platform blog: [Manage SSL/TLS certificates securely and efficiently in the cloud](https://blog.naver.com/n_cloudplatform/223440417679?trackingCode=blog_bloghome_searchlist) Note If you're still having trouble finding what you need, click on the feedback icon and send us your thoughts and requests. We'll use your feedback to improve this guide.