GTK WebView, failed to load shared libraries.

GTK WebView, failed to load shared libraries. - Printable Version

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GTK WebView, failed to load shared libraries. - TimeMen - Nov-07-2018

Hey there,
troubling with the the WebView from WebKitGTK.
Created a large project using the WebView at some points.
On my old OS (Linux Mint 19) all worked well, but after setting up my new notebook with a Manjaro Linux (Arch), I get those error messages after executing the file.

[rtfm@Inspiron ~]$ python3
Python 3.7.1 (default, Oct 22 2018, 10:41:28) 
[GCC 8.2.1 20180831] on linux
Type "help", "copyright", "credits" or "license" for more information.
>>> import gi
>>> gi.require_version('WebKit', '3.0')
>>> from gi.repository import WebKit

(.:2689): Gtk-WARNING **: 13:43:59.853: Theme parsing error: gtk.css:68:35: The style property GtkButton:child-displacement-x is deprecated and shouldn't be used anymore. It will be removed in a future version

(.:2689): Gtk-WARNING **: 13:43:59.853: Theme parsing error: gtk.css:69:35: The style property GtkButton:child-displacement-y is deprecated and shouldn't be used anymore. It will be removed in a future version

(.:2689): Gtk-WARNING **: 13:43:59.853: Theme parsing error: gtk.css:73:46: The style property GtkScrolledWindow:scrollbars-within-bevel is deprecated and shouldn't be used anymore. It will be removed in a future version
>>> wv = WebKit.WebView()

** (.:2689): WARNING **: 13:44:23.836: Failed to load shared library 'libwebkitgtk-3.0.so.0' referenced by the typelib: libicui18n.so.62: Kann die Shared-Object-Datei nicht öffnen: Datei oder Verzeichnis nicht gefunden

** (.:2689): WARNING **: 13:44:23.837: Failed to load shared library 'libjavascriptcoregtk-3.0.so.0' referenced by the typelib: libicui18n.so.62: Kann die Shared-Object-Datei nicht öffnen: Datei oder Verzeichnis nicht gefunden
__main__:1: Warning: cannot retrieve class for invalid (unclassed) type 'void'
Traceback (most recent call last):
  File "<stdin>", line 1, in <module>
TypeError: could not get a reference to type class

All the libs I needed from Pip I've installed already, but I don't know how to solve this problem.
In the AUR there are no packages called like the above mentioned libraries.

[rtfm@Inspiron ~]$ uname -a
Linux Inspiron 4.14.78-1-MANJARO #1 SMP PREEMPT Sun Oct 21 07:57:51 UTC 2018 x86_64 GNU/Linux
[rtfm@Inspiron ~]$ python --version
Python 3.7.1

It would be great, if someone could post some ideas or maybe an solution.
Best wishes,
TimeMen