diff --git a/frontend/src/router.js b/frontend/src/router.js
index 8f1db2ea76..1101697414 100644
--- a/frontend/src/router.js
+++ b/frontend/src/router.js
@@ -704,6 +704,9 @@ async function requireChecklist(to, from, next) {
 }
 
 export function campFromRoute(route) {
+  if (!route.params.campId) {
+    return undefined
+  }
   return apiStore.get().camps({ id: route.params.campId })
 }
 
@@ -712,24 +715,39 @@ export function invitationFromInviteKey(inviteKey) {
 }
 
 export function periodFromRoute(route) {
+  if (!route.params.periodId) {
+    return undefined
+  }
   return apiStore.get().periods({ id: route.params.periodId })
 }
 
 function scheduleEntryFromRoute(route) {
+  if (!route.params.scheduleEntryId) {
+    return undefined
+  }
   return apiStore.get().scheduleEntries({ id: route.params.scheduleEntryId })
 }
 
 function categoryFromRoute(route) {
+  if (!route.params.categoryId) {
+    return undefined
+  }
   return campFromRoute(route)
     .categories()
     .allItems.find((c) => c.id === route.params.categoryId)
 }
 
 export function materialListFromRoute(route) {
+  if (!route.params.materialId) {
+    return undefined
+  }
   return apiStore.get().materialLists({ id: route.params.materialId })
 }
 
 export function checklistFromRoute(route) {
+  if (!route.params.checklistId) {
+    return undefined
+  }
   return campFromRoute(route)
     .checklists()
     .allItems.find((c) => c.id === route.params.checklistId)
@@ -755,6 +773,9 @@ function getContentLayout(route) {
 }
 
 function dayFromScheduleEntryInRoute(route) {
+  if (!route.params.scheduleEntryId) {
+    return undefined
+  }
   return apiStore.get().scheduleEntries({ id: route.params.scheduleEntryId }).day()
 }
 
@@ -934,6 +955,9 @@ export function checklistOverviewRoute(camp, checklist, query = {}) {
 }
 
 async function firstFuturePeriod(route) {
+  if (!route.params.campId) {
+    return undefined
+  }
   const periods = await apiStore.get().camps({ id: route.params.campId }).periods()._meta
     .load
   // Return the first period that hasn't ended, or if no such period exists, return the first period