trying to figure out why it's dieing without saying why

.gitlab-ci.yml

@@ -87,7 +87,7 @@ build-userguide:
       find . -name '*.md' -type f -print0 | xargs -0 sed -E -i 's/(!\[[a-zA-Z0-9"\/\ \-]*])\(\/img\//\1(img\//g'
     - |
       ## Now let's make a pdf
-      gwtc --verbose --toc Home.md --title "GridTracker User's Guide" --logo-img img/GridTracker_logo.png --format pdf --output ../artifacts/docs/ --pdf-page-count --file-name UserGuide .
+      gwtc --verbose --toc Home.md --title "GridTracker User's Guide" --logo-img img/GridTracker_logo.png --format all --output ../artifacts/docs/ --pdf-page-count --file-name UserGuide .
       cd ..
       ls ./artifacts/docs