diff --git a/web/state.js b/web/state.js
index f2c7f997..34ad04c4 100644
--- a/web/state.js
+++ b/web/state.js
@@ -158,22 +158,43 @@ function restoreState(state) {
   // instead of setting ninja-radio-default-version if selection is undefined or 0, 
   // first check so the default can be controlled in the html 
   if (state.ninjaMode !== undefined) {
-    document.getElementById('ninja-radio-default-version').checked = state.ninjaMode == 0;
-    document.getElementById('ninja-radio-system-version').checked = state.ninjaMode == 1;
+    const ninjaDefaultVersionRadio = document.getElementById('ninja-radio-default-version');
+    if (ninjaDefaultVersionRadio) {
+      ninjaDefaultVersionRadio.checked = state.ninjaMode == 0;
+    }
+    const ninjaSystemVersionRadio = document.getElementById('ninja-radio-system-version');
+    // not available in the DOM is system ninja is not available
+    if (ninjaSystemVersionRadio) {
+      ninjaSystemVersionRadio.checked = state.ninjaMode == 1;
+    }
     document.getElementById('ninja-radio-select-version').checked = state.ninjaMode == 2;
     document.getElementById('ninja-radio-path-executable').checked = state.ninjaMode == 3;
   }
 
   if (state.cmakeMode !== undefined) {
-    document.getElementById('cmake-radio-default-version').checked = state.cmakeMode == 0;
-    document.getElementById('cmake-radio-system-version').checked = state.cmakeMode == 1;
+    const cmakeDefaultVersionRadio = document.getElementById('cmake-radio-default-version');
+    if (cmakeDefaultVersionRadio) {
+      cmakeDefaultVersionRadio.checked = state.cmakeMode == 0;
+    }
+    const cmakeSystemVersionRadio = document.getElementById('cmake-radio-system-version');
+    // not available in the DOM is system cmake is not available
+    if (cmakeSystemVersionRadio) {
+      cmakeSystemVersionRadio.checked = state.cmakeMode == 1;
+    }
     document.getElementById('cmake-radio-select-version').checked = state.cmakeMode == 2;
     document.getElementById('cmake-radio-path-executable').checked = state.cmakeMode == 3;
   }
 
-  if (state.pythonMode !== undefined) {
-    document.getElementById('python-radio-default-version').checked = state.pythonMode == 0;
-    document.getElementById('python-radio-system-version').checked = state.pythonMode == 1;
+  if (state.pythonMode !== undefined && document.getElementById('python-radio-path-executable') !== undefined) {
+    const pythonDefaultVersionRadio = document.getElementById('python-radio-default-version');
+    if (pythonDefaultVersionRadio) {
+      pythonDefaultVersionRadio.checked = state.pythonMode == 0;
+    }
+    const pythonSystemVersionRadio = document.getElementById('python-radio-system-version');
+    // not available in the DOM is system python is not available
+    if (pythonSystemVersionRadio) {
+      pythonSystemVersionRadio.checked = state.pythonMode == 1;
+    }
     document.getElementById('python-radio-path-executable').checked = state.pythonMode == 2;
   }