[Home](./index.md) > [puppeteer](./puppeteer.md) > [Protocol](./puppeteer.protocol.md) > [Page](./puppeteer.protocol.page.md) > [AppManifestError](./puppeteer.protocol.page.appmanifesterror.md) > [critical](./puppeteer.protocol.page.appmanifesterror.critical.md) ## Protocol.Page.AppManifestError.critical property If criticial, this is a non-recoverable parse error. Signature: ```typescript critical: integer; ```