diff --git a/webapp/src/views/schedule/index.vue b/webapp/src/views/schedule/index.vue
index be0a1e04..6804a4ec 100644
--- a/webapp/src/views/schedule/index.vue
+++ b/webapp/src/views/schedule/index.vue
@@ -156,9 +156,9 @@ export default {
 					if (results && results.length) {
 						founds = self.schedule.talks.filter(t => {
 							if (refKey === 'session_type') {
-								if (typeof t.session_type === 'string') {
+								if (typeof t?.session_type === 'string') {
 									return selectedIds.includes(t.session_type) && results.includes(t.id)
-								} else {
+								} else if (typeof t?.session_type === 'object') {
 									return Object.keys(t.session_type).some(key => selectedIds.includes(t.session_type[key])) && results.includes(t.id)
 								}
 							}
@@ -166,9 +166,9 @@ export default {
 					} else {
 						founds = self.schedule.talks.filter(t => {
 							if (refKey === 'session_type') {
-								if (typeof t.session_type === 'string') {
+								if (typeof t?.session_type === 'string') {
 									return selectedIds.includes(t.session_type)
-								} else {
+								} else if (typeof t?.session_type === 'object') {
 									return Object.keys(t.session_type).some(key => selectedIds.includes(t.session_type[key]))
 								}
 							}
@@ -224,10 +224,10 @@ export default {
 			const setSessionType = new Set()
 			const enLanguage = 'en'
 
-			this.schedule.session_type.forEach(t => {
-				if (typeof t.session_type === 'string') {
+			this.schedule?.session_type.forEach(t => {
+				if (typeof t?.session_type === 'string') {
 					setSessionType.add(t.session_type)
-				} else {
+				} else if (typeof t?.session_type === 'object') {
 					const sessionTypeKeyArray = Object.keys(t.session_type)
 					let isEnglish = false
 
@@ -359,9 +359,9 @@ export default {
 
 			data.forEach(
 				t => {
-					if (typeof t.name === 'string') {
+					if (typeof t?.name === 'string') {
 						setMap.set(t.id, t.name)
-					} else {
+					} else if (typeof t?.name === 'object') {
 						const keyArray = Object.keys(t.name)
 						let isEnglish = false
 
diff --git a/webapp/src/views/schedule/sessions/index.vue b/webapp/src/views/schedule/sessions/index.vue
index 95f6203e..2ec2691e 100644
--- a/webapp/src/views/schedule/sessions/index.vue
+++ b/webapp/src/views/schedule/sessions/index.vue
@@ -144,9 +144,9 @@ export default {
 					if (results && results.length) {
 						founds = self.schedule.talks.filter(t => {
 							if (refKey === 'session_type') {
-								if (typeof t.session_type === 'string') {
+								if (typeof t?.session_type === 'string') {
 									return selectedIds.includes(t.session_type) && results.includes(t.id)
-								} else {
+								} else if (typeof t?.session_type === 'object') {
 									return Object.keys(t.session_type).some(key => selectedIds.includes(t.session_type[key])) && results.includes(t.id)
 								}
 							}
@@ -154,9 +154,9 @@ export default {
 					} else {
 						founds = self.schedule.talks.filter(t => {
 							if (refKey === 'session_type') {
-								if (typeof t.session_type === 'string') {
+								if (typeof t?.session_type === 'string') {
 									return selectedIds.includes(t.session_type)
-								} else {
+								} else if (typeof t?.session_type === 'object') {
 									return Object.keys(t.session_type).some(key => selectedIds.includes(t.session_type[key]))
 								}
 							}
@@ -212,10 +212,10 @@ export default {
 			const setSessionType = new Set()
 			const enLanguage = 'en'
 
-			this.schedule.session_type.forEach(t => {
-				if (typeof t.session_type === 'string') {
+			this.schedule?.session_type?.forEach(t => {
+				if (typeof t?.session_type === 'string') {
 					setSessionType.add(t.session_type)
-				} else {
+				} else if (typeof t?.session_type === 'object') {
 					const sessionTypeKeyArray = Object.keys(t.session_type)
 					let isEnglish = false
 
@@ -347,9 +347,9 @@ export default {
 
 			data.forEach(
 				t => {
-					if (typeof t.name === 'string') {
+					if (typeof t?.name === 'string') {
 						setMap.set(t.id, t.name)
-					} else {
+					} else if (typeof t?.name === 'object') {
 						const keyArray = Object.keys(t.name)
 						let isEnglish = false