diff --git a/lib/Service/FolderService.php b/lib/Service/FolderService.php
index 5c1a52c9f5..ecf33e995e 100644
--- a/lib/Service/FolderService.php
+++ b/lib/Service/FolderService.php
@@ -72,16 +72,22 @@ public function getFileById(?int $nodeId = null): File {
 			foreach ($mountsContainingFile as $fileInfo) {
 				$this->root->getByIdInPath($nodeId, $fileInfo->getMountPoint());
 			}
+			/** @var File[] */
 			$file = $this->root->getById($nodeId);
 			if ($file) {
-				/** @var File */
+				if (!$file[0]->fopen('r')) {
+					throw new NotFoundException('Invalid node');
+				}
 				return $file[0];
 			}
 
 			$folder = $this->root->getUserFolder($this->getUserId());
+			/** @var File[] */
 			$file = $folder->getById($nodeId);
 			if ($file) {
-				/** @var File */
+				if (!$file[0]->fopen('r')) {
+					throw new NotFoundException('Invalid node');
+				}
 				return current($file);
 			}
 		}
diff --git a/src/Components/PreviewSignature/PreviewSignature.vue b/src/Components/PreviewSignature/PreviewSignature.vue
index 9d008cc56b..d39d2ed224 100644
--- a/src/Components/PreviewSignature/PreviewSignature.vue
+++ b/src/Components/PreviewSignature/PreviewSignature.vue
@@ -68,13 +68,14 @@ export default {
 				.then(response => {
 					const buffer = Buffer.from(response.data, 'binary').toString('base64')
 					this.imageData = 'data:application/pdf;base64,' + buffer
-					this.onImageLoad()
+					this.onImageLoad(true)
 				})
+				.catch(() => this.onImageLoad(false))
 		},
-		onImageLoad() {
+		onImageLoad(status) {
 			this.loading = false
 			this.isLoaded = true
-			this.$emit('loaded')
+			this.$emit('loaded', status)
 		},
 	},
 }
diff --git a/src/views/Account/partials/Signature.vue b/src/views/Account/partials/Signature.vue
index 91ce306784..161d6712e0 100644
--- a/src/views/Account/partials/Signature.vue
+++ b/src/views/Account/partials/Signature.vue
@@ -78,10 +78,11 @@ export default {
 	data: () => ({
 		isEditing: false,
 		isSignatureLoaded: false,
+		signatureExists: true,
 	}),
 	computed: {
 		hasSignature() {
-			return this.signatureElementsStore.hasSignatureOfType(this.type)
+			return this.signatureElementsStore.hasSignatureOfType(this.type) && this.signatureExists
 		},
 		imgSrc() {
 			if (this.signatureElementsStore.signs[this.type]?.value?.startsWith('data:')) {
@@ -91,8 +92,9 @@ export default {
 		},
 	},
 	methods: {
-		signatureLoaded() {
-			this.isSignatureLoaded = true
+		signatureLoaded(success) {
+			this.isSignatureLoaded = success
+			this.signatureExists = success
 		},
 		edit() {
 			this.isEditing = true