diff --git a/services/web/frontend/js/infrastructure/error-reporter.js b/services/web/frontend/js/infrastructure/error-reporter.js
index c63929d9c4..a5fac2cb29 100644
--- a/services/web/frontend/js/infrastructure/error-reporter.js
+++ b/services/web/frontend/js/infrastructure/error-reporter.js
@@ -26,6 +26,7 @@ function sentryReporter() {
             'SecurityError: Permission denied to access property "pathname" on cross-origin object',
             // Ignore unhandled error that is "expected" - see https://github.com/overleaf/issues/issues/3321
             /^Missing PDF/,
+            /^pdfng error Error: MissingPDFException/,
             // Ignore "expected" error from aborted fetch - see https://github.com/overleaf/issues/issues/3321
             /^AbortError/,
             // Ignore spurious error from Ace internals - see https://github.com/overleaf/issues/issues/3321