diff --git a/.gitignore b/.gitignore
index 0befe13..33014e4 100644
--- a/.gitignore
+++ b/.gitignore
@@ -5,3 +5,5 @@ config.json
 package-lock.json
 .env
 .vercel
+docker_build.bat
+docker_run.bat
diff --git a/dataManager.js b/dataManager.js
index 83c95bf..64f13c4 100644
--- a/dataManager.js
+++ b/dataManager.js
@@ -116,11 +116,14 @@ async function swapFront() {
     for (member of front) {
         let m = await system.getMemberById(member.content.member)
 
-        if (m.content.pkId) {
+        if (m.content && m.content.pkId) {
             // fronting member pkID has been found
             newFront.push(m.content.pkId)
             frontNames.push(m.content.name)
         }
+        else {
+            console.warn('::SimplyWS:: System member not found, this may be a custom front which is unsupported.')
+        }
     }
 
     // shift primary fronter to first in list