Use the correct path

.gitignore

@@ -1 +1,2 @@
-diplomarbeitsbuch.pdf
+diplomarbeitsbuch.pdf
+defensio.pdf

Defensio/puppeteer-config.json

@@ -0,0 +1,3 @@
+{
+  "args": ["--no-sandbox"]
+}

_extensions/diagram/diagram.lua

@@ -151,6 +151,11 @@ local mermaid = {
   compile = function (self, code)
     local mime_type = self.mime_type or 'image/svg+xml'
     local file_extension = extension_for_mimetype[mime_type]
+
+    -- Resolve puppeteer config path
+    local puppeteer_config = pandoc.path.join({pandoc.system.get_working_directory(), 'puppeteer-config.json'})
+
+
     return with_temporary_directory("diagram", function (tmpdir)
       return with_working_directory(tmpdir, function ()
         local infile = 'diagram.mmd'
@@ -158,7 +163,7 @@ local mermaid = {
         write_file(infile, code)
         pipe(
           self.execpath or 'mmdc',
-          {"--pdfFit", "--iconPacksNamesAndUrls", "mdi#https://unpkg.com/@iconify-json/mdi@1.2.3/icons.json", "--input", infile, "--output", outfile},
+          {"--pdfFit", "--iconPacksNamesAndUrls", "mdi#https://unpkg.com/@iconify-json/mdi@1.2.3/icons.json", "-p", puppeteer_config, "--input", infile, "--output", outfile},
           ''
         )
         return read_file(outfile), mime_type
@@ -167,6 +172,24 @@ local mermaid = {
   end,
 }
 
+-- Source - https://stackoverflow.com/a/27028488
+-- Posted by hookenz, modified by community. See post 'Timeline' for change history
+-- Retrieved 2026-04-18, License - CC BY-SA 4.0
+
+function dump(o)
+   if type(o) == 'table' then
+      local s = '{ '
+      for k,v in pairs(o) do
+         if type(k) ~= 'number' then k = '"'..k..'"' end
+         s = s .. '['..k..'] = ' .. dump(v) .. ','
+      end
+      return s .. '} '
+   else
+      return tostring(o)
+   end
+end
+
+
 --- TikZ
 --
 

puppeteer-config.json

@@ -0,0 +1,3 @@
+{
+  "args": ["--no-sandbox"]
+}