--- description: Fix common native build errors in Capawesome Cloud — Java version, out-of-memory, and signing issues — or get an instant AI diagnosis with Ask AI. title: Troubleshooting Native Builds - Capawesome image: https://capawesome.io/docs/assets/images/social/cloud/native-builds/troubleshooting.png --- [ Skip to content](#troubleshooting) [ 🔐 Introducing the **Capacitor Vault** plugin — store secrets behind biometrics or a device passcode.](/blog/announcing-the-capacitor-vault-plugin/) * [ SDKs ](/docs/sdks/) * [ Formbricks ](/docs/sdks/capacitor/formbricks/) * [ Geocoder ](/docs/sdks/capacitor/geocoder/) * [ Google Sign-In ](/docs/sdks/capacitor/google-sign-in/) * [ Grafana Faro ](/docs/sdks/capacitor/grafana-faro/) * [ libSQL ](/docs/sdks/capacitor/libsql/) * [ Live Update ](/docs/sdks/capacitor/live-update/) * [ Managed Configurations ](/docs/sdks/capacitor/managed-configurations/) * [ Media Session ](/docs/sdks/capacitor/media-session/) * [ ML Kit ](/docs/sdks/capacitor/mlkit/) * [ Navigation Bar ](/docs/sdks/capacitor/navigation-bar/) * [ NFC ](/docs/sdks/capacitor/nfc/) * [ OAuth ](/docs/sdks/capacitor/oauth/) * [ Pedometer ](/docs/sdks/capacitor/pedometer/) * [ Photo Editor ](/docs/sdks/capacitor/photo-editor/) * [ PostHog ](/docs/sdks/capacitor/posthog/) * [ Printer ](/docs/sdks/capacitor/printer/) * [ Purchases ](/docs/sdks/capacitor/purchases/) * [ RealtimeKit ](/docs/sdks/capacitor/realtimekit/) * [ Screen Orientation ](/docs/sdks/capacitor/screen-orientation/) * [ Screenshot ](/docs/sdks/capacitor/screenshot/) * [ Secure Preferences ](/docs/sdks/capacitor/secure-preferences/) * [ Speech Recognition ](/docs/sdks/capacitor/speech-recognition/) * [ Speech Synthesis ](/docs/sdks/capacitor/speech-synthesis/) * [ Share Target ](/docs/sdks/capacitor/share-target/) * [ Square Mobile Payments ](/docs/sdks/capacitor/square-mobile-payments/) * [ SQLite ](/docs/sdks/capacitor/sqlite/) * [ Superwall ](/docs/sdks/capacitor/superwall/) * [ Torch ](/docs/sdks/capacitor/torch/) * [ Vault ](/docs/sdks/capacitor/vault/) * [ Wifi ](/docs/sdks/capacitor/wifi/) * [ Zip ](/docs/sdks/capacitor/zip/) * [ Cordova ](/docs/sdks/cordova/) * [ Cloud ](/docs/cloud/) * [ Integrations ](/docs/cloud/live-updates/integrations/) * Concepts * Reference * [ Troubleshooting ](/docs/cloud/live-updates/troubleshooting/) * [ FAQ ](/docs/cloud/live-updates/faq/) * [ Native Builds ](/docs/cloud/native-builds/) * [ Set Up Environments ](/docs/cloud/native-builds/environments/) * [ Overwrite Native Configurations ](/docs/cloud/native-builds/native-configurations/) * [ Auto-Increment Build Numbers ](/docs/cloud/native-builds/auto-incrementing-build-numbers/) * [ Configure the Web Build Script ](/docs/cloud/native-builds/web-build-script/) * [ Build from a Monorepo ](/docs/cloud/native-builds/monorepo/) * [ Use pnpm, Yarn, or bun ](/docs/cloud/native-builds/package-managers/) * [ Install Private npm Packages ](/docs/cloud/native-builds/npm-private-registry/) * [ Override the Java Version ](/docs/cloud/native-builds/override-java-version/) * [ Custom iOS Provisioning Profiles ](/docs/cloud/native-builds/custom-ios-provisioning-profiles/) * [ Build without Git ](/docs/cloud/native-builds/build-without-git/) * [ Access Git Behind a Firewall ](/docs/cloud/native-builds/firewall-access/) * [ Integrations ](/docs/cloud/native-builds/integrations/) * Reference * Troubleshooting [ Troubleshooting ](/docs/cloud/native-builds/troubleshooting/) * [ FAQ ](/docs/cloud/native-builds/faq/) * [ App Store Publishing ](/docs/cloud/app-store-publishing/) * [ Submit a Build ](/docs/cloud/app-store-publishing/submit-a-build/) * [ Submit Automatically After a Build ](/docs/cloud/app-store-publishing/submit-automatically/) * [ Troubleshooting ](/docs/cloud/app-store-publishing/troubleshooting/) * [ FAQ ](/docs/cloud/app-store-publishing/faq/) * [ Automations ](/docs/cloud/automations/) * [ Reference ](/docs/cloud/automations/reference/) * [ Troubleshooting ](/docs/cloud/automations/troubleshooting/) * [ FAQ ](/docs/cloud/automations/faq/) * [ Assist ](/docs/cloud/assist/) * [ CLI ](/docs/cloud/cli/) * APIs and SDKs * [ Webhooks ](/docs/cloud/webhooks/) * [ Integrations ](/docs/cloud/integrations/) * Account * [ Organization ](/docs/cloud/organizations/) * [ Two-Factor Enforcement ](/docs/cloud/organizations/two-factor-authentication/) * [ Audit Logs ](/docs/cloud/organizations/audit-logs/) * [ Billing ](/docs/cloud/organizations/billing/) * [ License Keys ](/docs/cloud/license-keys/) * [ AI ](/docs/ai/) * [ Insiders ](/docs/insiders/) * [ Billing & Plans ](/docs/insiders/billing-and-plans/) * [ FAQ ](/docs/insiders/faq/) * [ License ](https://capawesome.io/legal/eula/) * [ Support ](/docs/support/) * [ Contributing ](/docs/contributing/) * Contributing code * [ Code of Conduct ](/docs/contributing/code-of-conduct/) * [ Questions ](https://docs.github.com/en/discussions/collaborating-with-your-community-using-discussions/participating-in-a-discussion#creating-a-discussion) * [ Blog ](/blog/) * Categories # Troubleshooting[¶](#troubleshooting "Permanent link") ## First, try Ask AI[¶](#first-try-ask-ai "Permanent link") On any failed build, click **Ask AI** in the Console to get a one-click diagnosis — the likely cause, an explanation, and a suggested fix — without leaving the dashboard. It's the fastest way to understand a failure, and it's included free in every plan with build minutes. See [Cloud Assist → Ask AI](/docs/cloud/assist/ask-ai/). If you'd rather diagnose manually, match your error below. ## Error `invalid source release: 21`[¶](#error-invalid-source-release-21 "Permanent link") The wrong Java version is being used. Set the `JAVA_VERSION` [environment variable](/docs/cloud/native-builds/environment-variables/#reserved-variables) to a supported major version such as `17` or `21`. For Capacitor 7, Java 21 is the default. ## Error `JavaScript heap out of memory`[¶](#error-javascript-heap-out-of-memory "Permanent link") Node.js ran out of memory during the web build. The default heap limit is \~2 GB, which may not be enough for large projects. Add `NODE_OPTIONS` as an [environment variable](/docs/cloud/native-builds/environments/) with the value `--max-old-space-size=4096` (4 GB); use `8192` if that's still not enough. Alternatively, set it directly in your build script: `[](#%5F%5Fcodelineno-0-1)"capawesome:build": "NODE_OPTIONS='--max-old-space-size=4096' npm run build" ` ## Build fails during signing[¶](#build-fails-during-signing "Permanent link") If an iOS or Android build fails while signing, confirm that the [signing certificate](/docs/cloud/native-builds/certificates/) is configured correctly and that the provisioning profile matches the bundle ID and selected build type. For multi-target apps, see [Custom iOS provisioning profiles](/docs/cloud/native-builds/custom-ios-provisioning-profiles/). ## Still stuck?[¶](#still-stuck "Permanent link") Reach out via [Support](/docs/support/) with a link to the failed build and its logs. June 8, 2026 Back to top