After install settings referring to wrong CSS/JS

[icyground]

Hello,
I installed wpkg-express-2 according to documentation and the install went quite well. Unfortunately heading to the settings page for creating a local user after installation fails - the site requests non existing css/js and saving the settings does not work.

CakeTheme.main.css:1 Failed to load resource: the server responded with a status of 404 (Not Found)
CakeTheme.main-i18n-en.js:1 Failed to load resource: the server responded with a status of 404 (Not Found)
CakeTheme.main-plugins.css:1 Failed to load resource: the server responded with a status of 404 (Not Found)
CakeTheme.tree.css:1 Failed to load resource: the server responded with a status of 404 (Not Found)
CakeTheme.flagstrap.css:1 Failed to load resource: the server responded with a status of 404 (Not Found)
CakeTheme.tree.js:1 Failed to load resource: the server responded with a status of 404 (Not Found)
CakeTheme.flagstrap.js:1 Failed to load resource: the server responded with a status of 404 (Not Found)
CakeTheme.main-layout.js:1 Failed to load resource: the server responded with a status of 404 (Not Found)
CakeTheme.libs.js:1 Uncaught SyntaxError: Unexpected token '<'
CakeTheme.main.js:1 Uncaught SyntaxError: Unexpected token '<'
CakeTheme.main-min.js:9 Uncaught ReferenceError: jQuery is not defined
    at Object.<anonymous> (CakeTheme.main-min.js:9)
    at t (CakeTheme.main-min.js:9)
    at CakeTheme.main-min.js:9
    at Object.<anonymous> (CakeTheme.main-min.js:9)
    at t (CakeTheme.main-min.js:9)
    at CakeTheme.main-min.js:9
    at Object.<anonymous> (CakeTheme.main-min.js:9)
    at t (CakeTheme.main-min.js:9)
    at Object.<anonymous> (CakeTheme.main-min.js:9)
    at t (CakeTheme.main-min.js:9)
CakeTheme.main-i18n-en.js:1 Failed to load resource: the server responded with a status of 404 (Not Found)
CakeTheme.tree.css:1 Failed to load resource: the server responded with a status of 404 (Not Found)
CakeTheme.main-plugins.css:1 Failed to load resource: the server responded with a status of 404 (Not Found)
CakeTheme.flagstrap.css:1 Failed to load resource: the server responded with a status of 404 (Not Found)
CakeTheme.main-plugins.js:1 Uncaught SyntaxError: Unexpected token '<'
CakeTheme.tree.js:1 Failed to load resource: the server responded with a status of 404 (Not Found)
CakeTheme.flagstrap.js:1 Failed to load resource: the server responded with a status of 404 (Not Found)
add.min.js?v=5f677a9a:1 Uncaught ReferenceError: jQuery is not defined
    at add.min.js?v=5f677a9a:1
add.min.js?v=5f677a9a:1 Uncaught ReferenceError: jQuery is not defined
    at add.min.js?v=5f677a9a:1
view.min.js?v=5f677a9a:1 Uncaught ReferenceError: jQuery is not defined
    at view.min.js?v=5f677a9a:1
add.min.js?v=5f677a9a:1 Uncaught ReferenceError: jQuery is not defined
    at add.min.js?v=5f677a9a:1
add.min.js?v=5f677a9a:1 Uncaught ReferenceError: jQuery is not defined
    at add.min.js?v=5f677a9a:1
view.min.js?v=5f677a9a:1 Uncaught ReferenceError: jQuery is not defined
    at view.min.js?v=5f677a9a:1
add.min.js?v=5f677a9a:1 Uncaught ReferenceError: jQuery is not defined
    at add.min.js?v=5f677a9a:1
CakeTheme.main-layout.js:1 Failed to load resource: the server responded with a status of 404 (Not Found)
CakeTheme.main.css:1 Failed to load resource: the server responded with a status of 404 (Not Found)
CakeTheme.main-plugins.css:1 Failed to load resource: the server responded with a status of 404 (Not Found)
CakeTheme.tree.css:1 Failed to load resource: the server responded with a status of 404 (Not Found)
CakeTheme.flagstrap.css:1 Failed to load resource: the server responded with a status of 404 (Not Found)`

The front page instead works flawless and is referencing to the correct css/js cake_theme/cache_(css|js)/*.v1552635653.(js|css)

Rewrite module is enabled

 apachectl -M
Loaded Modules:
 core_module (static)
 so_module (static)
 watchdog_module (static)
 http_module (static)
 log_config_module (static)
 logio_module (static)
 version_module (static)
 unixd_module (static)
 access_compat_module (shared)
 alias_module (shared)
 auth_basic_module (shared)
 authn_core_module (shared)
 authn_file_module (shared)
 authz_core_module (shared)
 authz_host_module (shared)
 authz_user_module (shared)
 autoindex_module (shared)
 deflate_module (shared)
 dir_module (shared)
 env_module (shared)
 filter_module (shared)
 mime_module (shared)
 mpm_prefork_module (shared)
 negotiation_module (shared)
 php7_module (shared)
 reqtimeout_module (shared)
 rewrite_module (shared)
 setenvif_module (shared)
 socache_shmcb_module (shared)
 ssl_module (shared)
 status_module (shared)

Any direction, what went wrong with my installation?

Additional note, I patched the code a bit, to support anonymous LDAP binding, but this should not interfere and works well with the installer:

diff --git a/Plugin/Datasources/Model/Datasource/LdapSource.php b/Plugin/Datasources/Model/Datasource/LdapSource.php
index 9210b65..aef19e9 100644
--- a/Plugin/Datasources/Model/Datasource/LdapSource.php
+++ b/Plugin/Datasources/Model/Datasource/LdapSource.php
@@ -248,7 +248,6 @@ class LdapSource extends DataSource {

                //Set our protocol version usually version 3
                ldap_set_option($this->database, LDAP_OPT_PROTOCOL_VERSION, $config['version']);
-                ldap_set_option($this->database, LDAP_OPT_X_TLS_REQUIRE_CERT, LDAP_OPT_X_TLS_NEVER);


                if ($config['tls']) {
@@ -260,12 +259,7 @@ class LdapSource extends DataSource {
                //So little known fact, if your php-ldap lib is built against openldap like pretty much every linux
                //distro out their like redhat, suse etc. The connect doesn't acutally happen when you call ldap_connect
                //it happens when you call ldap_bind.  So if you are using failover then you have to test here also.
-
-               if ($bindDN == "anonymous") {
-                       $bindResult = @ldap_bind($this->database);
-               } else {
-                       $bindResult = @ldap_bind($this->database, $bindDN, $bindPasswd); // @codingStandardsIgnoreLine
-               }
+               $bindResult = @ldap_bind($this->database, $bindDN, $bindPasswd); // @codingStandardsIgnoreLine
                if (!$bindResult) {
                        if (ldap_errno($this->database) == 49) {
                                $this->log("Auth failed for '$bindDN'!", 'ldap.error');
diff --git a/Plugin/Datasources/Test/Case/Model/Datasource/LdapSourceTest.php b/Plugin/Datasources/Test/Case/Model/Datasource/LdapSourceTest.php
index b233e37..c89e1eb 100644
--- a/Plugin/Datasources/Test/Case/Model/Datasource/LdapSourceTest.php
+++ b/Plugin/Datasources/Test/Case/Model/Datasource/LdapSourceTest.php
@@ -79,15 +79,8 @@ class LdapSourceTest extends CakeTestCase {
                $ldap = ldap_connect($config['host'], $config['port']);

                ldap_set_option($ldap, LDAP_OPT_PROTOCOL_VERSION, $config['version']);
-               ldap_set_option($this->database, LDAP_OPT_X_TLS_REQUIRE_CERT, LDAP_OPT_X_TLS_NEVER);

-               if ($config['login'] == 'anonymous') {
-                       $bindResult = @ldap_bind($ldap);
-               } else {
-                       $bindResult = @ldap_bind($ldap, $config['login'], $config['password']);
-               }
-
-               if (!$bindResult) {
+               if (!ldap_bind($ldap, $config['login'], $config['password'])) {
                        $this->markTestSkipped('Could not connect to LDAP server. Skip test.');
                }