halo-dev/halo · error · IllegalArgumentException

Provider resource does not exist inside its root: {value}

Error message

Provider resource does not exist inside its root: {value}

What it means

Error "Provider resource does not exist inside its root: {value}" thrown in halo-dev/halo.

Source

Thrown at application/src/main/java/run/halo/app/plugin/UiPluginBundleServiceImpl.java:240

                || !Set.of("format", "entry", "style").containsAll(fields)) {
            throw new IllegalArgumentException("Provider manifest must contain format, entry, and optional style only");
        }
        if (!"esm".equals(manifest.path("format").textValue())) {
            throw new IllegalArgumentException("Provider manifest format must be esm");
        }
        var entry = validateManifestResource(candidate, manifest.path("entry"));
        var style = manifest.has("style") ? validateManifestResource(candidate, manifest.path("style")) : null;
        return new ProviderManifest(entry, style);
    }

    private String validateManifestResource(ProviderCandidate candidate, JsonNode value) {
        if (!value.isTextual()) {
            throw new IllegalArgumentException("Provider resource path must be a string");
        }
        var resourcePath = normalizeResourcePath(value.textValue());
        var resource = providerResource(candidate, resourcePath);
        if (resource == null || !resource.isReadable()) {
            throw new IllegalArgumentException(
                    "Provider resource does not exist inside its root: " + value.textValue());
        }
        return resourcePath;
    }

    private static String normalizeResourcePath(String resourcePath) {
        if (!StringUtils.hasText(resourcePath)) {
            throw new IllegalArgumentException("Provider resource path must not be blank");
        }
        var normalizedSlashes = resourcePath.replace('\\', '/');
        if (normalizedSlashes.startsWith("/")
                || normalizedSlashes.startsWith("//")
                || normalizedSlashes.contains("?")
                || normalizedSlashes.contains("#")
                || normalizedSlashes.matches("^[a-zA-Z][a-zA-Z0-9+.-]*:.*")) {
            throw new IllegalArgumentException(
                    "Provider resource path must be provider-root-relative: " + resourcePath);
        }

View on GitHub (pinned to d2f5165f9c)

Solutions

1. Verify the entry/style path declared in the provider manifest actually exists inside the plugin bundle's static resources.
2. Rebuild the plugin so the bundler emits the entry file at the path recorded in the manifest.
3. Check for case-sensitivity mismatches between the manifest path and the packaged file name.

When it happens

Trigger: Thrown at application/src/main/java/run/halo/app/plugin/UiPluginBundleServiceImpl.java:240 when the library encounters an invalid state.

Common situations: See trigger scenarios.

AI-assisted analysis of halo-dev/halo@d2f5165f9c (2026-08-14). Data as JSON: /api/errors/7c574a833cf9fa5a. Report an issue: GitHub.