<!-- Do not edit this file. It is automatically generated by API Documenter. --> [Home](./index.md) > [puppeteer](./puppeteer.md) > [Protocol](./puppeteer.protocol.md) > [Security](./puppeteer.protocol.security.md) > [CertificateSecurityState](./puppeteer.protocol.security.certificatesecuritystate.md) > [certificateNetworkError](./puppeteer.protocol.security.certificatesecuritystate.certificatenetworkerror.md) ## Protocol.Security.CertificateSecurityState.certificateNetworkError property The highest priority network error code, if the certificate has an error. <b>Signature:</b> ```typescript certificateNetworkError?: string; ```