qt5 no module named '_hal'

Sorry for the delay. Running the install_script as you told me,
i got few errors:
cnc@LinuxCNC:/usr/lib/python2.7/dist-packages/qtvcp/designer$ bash install_script.sh

install_script.sh: Zeile 2: $'\r': Kommando nicht gefunden.

installing common base packages
[sudo] Passwort für cnc: 
Paketlisten werden gelesen... Fertig
Abhängigkeitsbaum wird aufgebaut.       
Statusinformationen werden eingelesen.... Fertig
E: Paket sound-theme-freedesktop
    kann nicht gefunden werden.
install_script.sh: Zeile 6: $'\r': Kommando nicht gefunden.

installing base packages for python2
Paketlisten werden gelesen... Fertig
Abhängigkeitsbaum wird aufgebaut.       
Statusinformationen werden eingelesen.... Fertig
E: Paket 
    kann nicht gefunden werden.
install_script.sh: Zeile 9: $'\r': Kommando nicht gefunden.
install_script.sh: Zeile 18: Syntaxfehler beim unerwarteten Wort `$'in\r''
'nstall_script.sh: Zeile 18: `    case $response in


 

Well darn, that didn't work.
It can be done manually.
I need to know what version of qt is on the system.
If you open qt designer and click on help/ about qt, what version does it say?

Thank you. The qt-version is 5.11.3 .

Again referencing (the bottom half) of this:
github.com/LinuxCNC/linuxcnc/blob/2.8/li.../designer/README.txt

you will find the libpyqt5_py2.so file in:
/usr/lib/python2.7/dist-packages/qtvcp/designer/x86_64/qt5.11

it needs to be extracted and put in:
/usr/lib/x86_64-linux-gnu/qt5/plugins/designer

The existing file named libpyqt5.s0 must be renamed libpyqt5_py3.so
Both of those things require sudo privileges.

then you need to create a link in:
~/.designer/plugins/python

that points to:
/usr/lib/python2.7/dist-packages/qtvcp/plugins/qtvcp_plugin.py

Then you should see the widgets in designer or some error messages about a few missing libraries, which we can address if they happen.

Thank you.
As you told me, i did:
>>/usr/lib/python2.7/dist-packages/qtvcp/designer/x86_64/qt5.11
Yes, the archive was present there. (picture1)

>>it needs to be extracted and put in:
>>/usr/lib/x86_64-linux-gnu/qt5/plugins/designer
>>The existing file named libpyqt5.s0 must be renamed libpyqt5_py3.so
Done. (picture2)

>>then you need to create a link in:
>>~/.designer/plugins/python
>>that points to:
>>/usr/lib/python2.7/dist-packages/qtvcp/plugins/qtvcp_plugin.py
Done (picture3)

>>Then you should see the widgets in designer or some error messages about a few missing libraries, which we can address if they happen.
Unfortunately the error remains. (see picture4)

Oh yes, thank you, that was my error!
I  have copied the lib in the correct folder and now i could see the linuxcnc-widgets!