one should use correct config entry name...

models/MatrixAccount.php

@@ -58,12 +58,12 @@ class MatrixAccount extends SimpleORMap
     {
         if (trim(Config::get()->MATRIX_SYSTEM_ACCOUNT_USERNAME) != '' &&
                 (trim(Config::get()->MATRIX_SYSTEM_ACCOUNT_PASSWORD) != '' ||
-                    trim(Config::get()->MATRIX_SYSTEM_ACCOUNT_TOKEN) != '')) {
+                    trim(Config::get()->MATRIX_SYSTEM_ACCOUNT_LOGIN_TOKEN) != '')) {
 
             // Login token specified, use this.
-            if (trim(Config::get()->MATRIX_SYSTEM_ACCOUNT_TOKEN) != '') {
+            if (trim(Config::get()->MATRIX_SYSTEM_ACCOUNT_LOGIN_TOKEN) != '') {
                 $account = new Patrix\Account(trim(Config::get()->MATRIX_SYSTEM_ACCOUNT_USERNAME), '',
-                    trim(Config::get()->MATRIX_SYSTEM_ACCOUNT_TOKEN));
+                    trim(Config::get()->MATRIX_SYSTEM_ACCOUNT_LOGIN_TOKEN));
             // No token, login by username and password.
             } else {
                 $account = new Patrix\Account(trim(Config::get()->MATRIX_SYSTEM_ACCOUNT_USERNAME),

plugin.manifest

 pluginname=Matrix-Chat
 pluginclassname=MatrixPlugin
 origin=data-quest
-version=1.1.q
+version=1.1.1
 screenshot=assets/images/matrix_logo.png
 description=Matrix chat for Stud.IP courses
 studipMinVersion=4.5