Avoid a null dereference.

apps/ssb.json

@@ -1,5 +1,5 @@
 {
 	"type": "tildefriends-app",
 	"emoji": "🐌",
-	"previous": "&zRv7YNZBT/NoliiTS7Jn/Q+3przdFZljUl8yPBIpSSE=.sha256"
+	"previous": "&RGDjjNsX3jYJFpOcDyI+LH2qmscuY0q8gP4dyJjOtww=.sha256"
 }

apps/ssb/tf-compose.js

@@ -291,6 +291,7 @@ class TfComposeElement extends LitElement {
 			);
 		}
 		let tribute = new Tribute({
+			iframe: this.shadowRoot,
 			collection: [
 				{
 					values: values,
@@ -325,6 +326,7 @@ class TfComposeElement extends LitElement {
 		let encrypt = this.renderRoot.getElementById('encrypt_to');
 		if (encrypt) {
 			let tribute = new Tribute({
+				iframe: this.shadowRoot,
 				values: Object.entries(this.users).map((x) => ({
 					key: x[1].name,
 					value: x[0],

apps/ssb/tribute.esm.js

@@ -483,8 +483,8 @@ class TributeRange {
 
     getDocument() {
         let iframe;
-        if (this.tribute.current.collection) {
+        if (this.tribute.current.collection[0].iframe) {
-            iframe = this.tribute.current.collection.iframe;
+            iframe = this.tribute.current.collection[0].iframe;
         }
 
         if (!iframe) {
@@ -653,8 +653,8 @@ class TributeRange {
     }
 
     getWindowSelection() {
-        if (this.tribute.collection.iframe) {
+        if (this.tribute.collection[0].iframe) {
-            return this.tribute.collection.iframe.contentWindow.getSelection()
+            return this.tribute.collection[0].iframe.getSelection()
         }
 
         return window.getSelection()

core/core.js

@@ -815,24 +815,6 @@ function setGlobalSettings(settings) {
 	}
 }
 
-/**
- * TODOC
- * @param {*} data
- * @param {*} bytes
- * @returns
- */
-function startsWithBytes(data, bytes) {
-	if (data.byteLength >= bytes.length) {
-		let dataBytes = new Uint8Array(data.slice(0, bytes.length));
-		for (let i = 0; i < bytes.length; i++) {
-			if (dataBytes[i] !== bytes[i] && bytes[i] !== null) {
-				return;
-			}
-		}
-		return true;
-	}
-}
-
 /**
  * TODOC
  * @param {*} response
@@ -1163,8 +1145,8 @@ async function blobHandler(request, response, blobId, uri) {
 		}
 
 		let app_object = JSON.parse(utf8Decode(await getBlobOrContent(app_id)));
-		id = app_object.files[uri.substring(1)];
+		id = app_object?.files[uri.substring(1)];
-		if (!id && app_object.files['handler.js']) {
+		if (!id && app_object?.files['handler.js']) {
 			let answer;
 			try {
 				answer = await useAppHandler(