diff --git a/dashboard/src/components/AppRepairDialog.vue b/dashboard/src/components/AppRepairDialog.vue
index de1d716fb..e13040a12 100644
--- a/dashboard/src/components/AppRepairDialog.vue
+++ b/dashboard/src/components/AppRepairDialog.vue
@@ -25,7 +25,7 @@ async function onSubmit() {
   busy.value = true;
   formError.value = '';
 
-  const errorState = (appError.value && appError.value.details?.installationState) || ISTATES.PENDING_CONFIGURE;
+  const errorState = (appError.value && appError.value.details.installationState) || ISTATES.PENDING_CONFIGURE;
   const data = {};
 
   let repairFunc;
@@ -95,7 +95,7 @@ defineExpose({
     fqdn.value = app.fqdn;
     appError.value = app.error || null;
 
-    const errorState = (app.error && app.error.details?.installationState) || ISTATES.PENDING_CONFIGURE;
+    const errorState = (app.error && app.error.details.installationState) || ISTATES.PENDING_CONFIGURE;
 
     if (errorState === ISTATES.PENDING_RESTORE || errorState === ISTATES.PENDING_IMPORT) {
       const [error, result] = await appsModel.backups(app.id);
diff --git a/dashboard/src/components/app/Location.vue b/dashboard/src/components/app/Location.vue
index 870d028e8..7aba0bf7e 100644
--- a/dashboard/src/components/app/Location.vue
+++ b/dashboard/src/components/app/Location.vue
@@ -185,7 +185,7 @@ onMounted(async () => {
   <div>
     <form @submit.prevent="onSubmit()" autocomplete="off" novalidate>
       <fieldset :disabled="busy">
-        <input type="submit" style="display: none;" :disabled="(app.error && app.error.details?.installationState !== ISTATES.PENDING_LOCATION_CHANGE) || app.taskId || !formValid"/>
+        <input type="submit" style="display: none;" :disabled="(app.error && app.error.details.installationState !== ISTATES.PENDING_LOCATION_CHANGE) || app.taskId || !formValid"/>
 
         <FormGroup>
           <label>{{ $t('app.location.location') }}</label>
@@ -253,6 +253,6 @@ onMounted(async () => {
     <br/>
     <Checkbox v-if="needsOverwriteDns" v-model="overwriteDns" :label="$t('app.location.dnsoverwrite')"/>
 
-    <Button @click="onSubmit()" :loading="busy" :disabled="busy || (app.error && app.error.details?.installationState !== ISTATES.PENDING_LOCATION_CHANGE) || app.taskId || !formValid">{{ $t('app.location.saveAction') }}</Button>
+    <Button @click="onSubmit()" :loading="busy" :disabled="busy || (app.error && app.error.details.installationState !== ISTATES.PENDING_LOCATION_CHANGE) || app.taskId || !formValid">{{ $t('app.location.saveAction') }}</Button>
   </div>
 </template>
diff --git a/dashboard/src/components/app/Repair.vue b/dashboard/src/components/app/Repair.vue
index 5e44524c9..847be6b08 100644
--- a/dashboard/src/components/app/Repair.vue
+++ b/dashboard/src/components/app/Repair.vue
@@ -68,7 +68,7 @@ onMounted(() => {
 
     <label>{{ $t('app.repair.taskError.title') }}</label>
     <p>{{ $t('app.repair.taskError.description') }}</p>
-    <p v-if="app.error">An error occurred during the <b>{{ taskNameFromInstallationState(app.error.details?.installationState) }}</b> operation: <span class="text-danger"><b>{{ app.error.reason + ': ' + app.error.message }}</b></span></p>
-    <Button @click="onRepair()" :disabled="app.taskId || !app.error" v-tooltip="app.taskId ? $t('app.repair.appIsBusyTooltip') : ''">{{ $t('app.repair.taskError.retryAction', { task: app.error ? taskNameFromInstallationState(app.error.details?.installationState) : '' }) }}</Button>
+    <p v-if="app.error">An error occurred during the <b>{{ taskNameFromInstallationState(app.error.details.installationState) }}</b> operation: <span class="text-danger"><b>{{ app.error.reason + ': ' + app.error.message }}</b></span></p>
+    <Button @click="onRepair()" :disabled="app.taskId || !app.error" v-tooltip="app.taskId ? $t('app.repair.appIsBusyTooltip') : ''">{{ $t('app.repair.taskError.retryAction', { task: app.error ? taskNameFromInstallationState(app.error.details.installationState) : '' }) }}</Button>
   </div>
 </template>
diff --git a/dashboard/src/components/app/Uninstall.vue b/dashboard/src/components/app/Uninstall.vue
index aa8d25a69..d09f9ec52 100644
--- a/dashboard/src/components/app/Uninstall.vue
+++ b/dashboard/src/components/app/Uninstall.vue
@@ -19,7 +19,7 @@ const props = defineProps([ 'app' ]);
 const latestBackup = ref(null);
 function isAppStopped() {
   if (props.app.error) {
-    if (props.app.error.details?.installationState === ISTATES.PENDING_START) return true;
+    if (props.app.error.details.installationState === ISTATES.PENDING_START) return true;
     else return false;
   } else if (props.app.installationState === ISTATES.PENDING_START || props.app.installationState === ISTATES.PENDING_STOP) {
     return props.app.installationState === ISTATES.PENDING_START;
@@ -102,7 +102,7 @@ onMounted(async () => {
       <label>{{ $t('app.uninstall.startStop.title') }}</label>
       <p>{{ $t('app.uninstall.startStop.description') }}</p>
       <Button @click="onToggleRunState()"
-        :disabled="toggleRunStateBusy || app.taskId || (app.error && (app.error.details?.installationState !== 'pending_start' && app.error.details?.installationState !== 'pending_stop')) || app.installationState === 'pending_start' || app.installationState === 'pending_stop'"
+        :disabled="toggleRunStateBusy || app.taskId || (app.error && (app.error.details.installationState !== 'pending_start' && app.error.details.installationState !== 'pending_stop')) || app.installationState === 'pending_start' || app.installationState === 'pending_stop'"
         :loading="toggleRunStateBusy || app.installationState === 'pending_start' || app.installationState === 'pending_stop'"
       >
         {{ $t(isAppStopped() ? 'app.uninstall.startStop.startAction' : 'app.uninstall.startStop.stopAction') }}
diff --git a/dashboard/src/views/AppConfigureView.vue b/dashboard/src/views/AppConfigureView.vue
index 8e4e535e9..46ad9ddf7 100644
--- a/dashboard/src/views/AppConfigureView.vue
+++ b/dashboard/src/views/AppConfigureView.vue
@@ -48,7 +48,7 @@ const sftpInfoDialog = useTemplateRef('sftpInfoDialog');
 const inputDialog = useTemplateRef('inputDialog');
 
 function onSetView(newView) {
-  if (!isViewEnabled(newView, app.value.error?.details?.installationState)) {
+  if (!isViewEnabled(newView, app.value.error?.details.installationState)) {
     currentView.value = 'info';
     window.location.hash = `/app/${id.value}/info`;
     return;
@@ -259,7 +259,7 @@ onBeforeUnmount(() => {
 
       <div class="configure-body">
         <div class="configure-menu pankow-no-mobile">
-          <div class="configure-menu-item" v-for="view in views" :key="view.id" @click="onSetView(view.id)" :active="currentView === view.id ? true : null" :disabled="isViewEnabled(view.id, app.error?.details?.installationState) ? null : true">{{ view.display }}</div>
+          <div class="configure-menu-item" v-for="view in views" :key="view.id" @click="onSetView(view.id)" :active="currentView === view.id ? true : null" :disabled="isViewEnabled(view.id, app.error?.details.installationState) ? null : true">{{ view.display }}</div>
         </div>
         <div class="configure-content">
           <Transition name="slide-fade" mode="out-in">
diff --git a/src/apps.js b/src/apps.js
index 3f56cc202..c1c6e3b49 100644
--- a/src/apps.js
+++ b/src/apps.js
@@ -1320,7 +1320,7 @@ function checkAppState(app, state) {
 
     if (app.installationState === exports.ISTATE_ERROR) {
         // allow task to be called again if that was the errored task
-        if (app.error.details?.installationState === state) return null;
+        if (app.error.details.installationState === state) return null;
 
         // allow uninstall from any state
         if (state !== exports.ISTATE_PENDING_UNINSTALL && state !== exports.ISTATE_PENDING_RESTORE && state !== exports.ISTATE_PENDING_IMPORT) return new BoxError(BoxError.BAD_STATE, 'Not allowed in error state');
@@ -2246,7 +2246,7 @@ async function repair(app, data, auditSource) {
     assert.strictEqual(typeof auditSource, 'object');
 
     const appId = app.id;
-    let errorState = (app.error && app.error.details?.installationState) || exports.ISTATE_PENDING_CONFIGURE;
+    let errorState = (app.error && app.error.details.installationState) || exports.ISTATE_PENDING_CONFIGURE;
 
     const task = {
         args: {},