Well it turned out, TextEncoder does NOT accept encoding label

ui/app.js

@@ -116,7 +116,7 @@ function startApp(rootEl) {
         return this.authErr.length > 0 || this.loadErr.length > 0;
       },
       async getSocketAuthKey(privateKey, randomKey) {
-        const enc = new TextEncoder("utf-8");
+        const enc = new TextEncoder();
 
         return new Uint8Array(
           await cipher.hmac512(enc.encode(privateKey), enc.encode(randomKey))

ui/commands/ssh.js

@@ -752,7 +752,7 @@ class Wizard {
     if (config.credential.length > 0) {
       sd.send(
         CLIENT_CONNECT_RESPOND_CREDENTIAL,
-        new TextEncoder("utf-8").encode(config.credential)
+        new TextEncoder().encode(config.credential)
       );
 
       return this.stepContinueWaitForEstablishWait();
@@ -782,7 +782,7 @@ class Wizard {
 
         sd.send(
           CLIENT_CONNECT_RESPOND_CREDENTIAL,
-          new TextEncoder("utf-8").encode(vv)
+          new TextEncoder().encode(vv)
         );
 
         newCredential(vv);

ui/control/ssh.js

@@ -91,7 +91,7 @@ class Control {
       return;
     }
 
-    return this.sender(new TextEncoder("utf-8").encode(data));
+    return this.sender(new TextEncoder().encode(data));
   }
 
   color() {

ui/socket.js

@@ -97,7 +97,7 @@ class Dial {
    *
    */
   async buildKeyString() {
-    const enc = new TextEncoder("utf-8");
+    const enc = new TextEncoder();
 
     let rTime = Number(Math.trunc(new Date().getTime() / 100000)),
       key = await crypt.hmac512(