diff --git a/.github/workflows/manage-prs.yml b/.github/workflows/manage-prs.yml
index 02d2ad6d..bd383d14 100644
--- a/.github/workflows/manage-prs.yml
+++ b/.github/workflows/manage-prs.yml
@@ -93,6 +93,7 @@ jobs:
 
     outputs:
       type: ${{ steps.parse-request.outputs.type }}
+      error: ${{ steps.parse-request.outputs.error }}
       arduinoLintLibraryManagerSetting: ${{ steps.parse-request.outputs.arduinoLintLibraryManagerSetting }}
       submissions: ${{ steps.parse-request.outputs.submissions }}
       index-entry: ${{ steps.parse-request.outputs.index-entry }}
@@ -133,6 +134,7 @@ jobs:
           # Due to limitations of the GitHub Actions workflow system, dedicated outputs must be created for use in
           # certain workflow fields.
           echo "::set-output name=type::$(echo "$REQUEST" | jq -r -c '.type')"
+          echo "::set-output name=error::$(echo "$REQUEST" | jq -r -c '.error')"
           echo "::set-output name=arduinoLintLibraryManagerSetting::$(echo "$REQUEST" | jq -r -c '.arduinoLintLibraryManagerSetting')"
           echo "::set-output name=submissions::$(echo "$REQUEST" | jq -c '.submissions')"
           echo "::set-output name=index-entry::$(echo "$REQUEST" | jq -r -c '.indexEntry')"
@@ -156,6 +158,34 @@ jobs:
           labels: |
             - ${{ needs.parse.outputs.type }}
 
+  parse-fail:
+    needs:
+      - parse
+    if: needs.parse.outputs.error != ''
+
+    runs-on: ubuntu-latest
+    steps:
+      - name: Comment on error detected while parsing PR
+        uses: octokit/request-action@v2.x
+        env:
+          GITHUB_TOKEN: ${{ secrets.GITHUB_TOKEN }}
+        with:
+          route: POST /repos/{owner}/{repo}/issues/{issue_number}/comments
+          owner: ${{ github.repository_owner }}
+          repo: ${{ github.event.repository.name }}
+          issue_number: ${{ github.event.pull_request.number }}${{ github.event.issue.number }}
+          body: |
+            |
+            Hi @${{ github.actor }}
+            A problem was found with your pull request:
+
+            ${{ env.ERROR_MESSAGE_PREFIX }}${{ needs.parse.outputs.error }}
+
+            Please resolve this error. The checks will automatically run again once that is done.
+
+            More information:
+            https://github.com/${{ github.repository }}/blob/main/README.md#if-the-problem-is-with-the-pull-request
+
   check-submissions:
     name: Check ${{ matrix.submission.submissionURL }}
     needs:
@@ -473,7 +503,10 @@ jobs:
   not-submission:
     needs:
       - parse
-    if: needs.parse.outputs.type != 'submission' # These request types can't be automatically approved.
+    # These request types can't be automatically approved.
+    if: >
+      needs.parse.outputs.type != 'submission' &&
+      needs.parse.outputs.type != 'invalid'
     runs-on: ubuntu-latest
     steps:
       - name: Comment on required review
@@ -497,6 +530,7 @@ jobs:
   unexpected-fail:
     needs:
       # Run after all other jobs
+      - parse-fail
       - merge-fail
       - check-submissions-fail
       - label
@@ -548,12 +582,14 @@ jobs:
 
   request-review:
     needs:
+      - parse-fail
       - merge-fail
       - not-submission
       - unexpected-fail
     if: >
       always() &&
       (
+        needs.parse-fail.result != 'skipped' ||
         needs.merge-fail.result != 'skipped' ||
         needs.not-submission.result != 'skipped' ||
         needs.unexpected-fail.result != 'skipped'