Firewall page error

When i go to the firewall page it shows a message to turn on firewall but the firewall is already on and running .
Trying to click on the switch icon the page freezes at that point and will not allow you to do anything on that page.
If I close it all down and go in again the same occurs.
I Have a screen shot but do not know how to show it.

Hi,
What is your current application version?
see:https://support.avast.com/en-ww/article/Update-Antivirus

To add a screenshot, click on " Attachments and other options" below the message/reply box.

You can try to remove and re-add the firewall component.
see:https://support.avast.com/en-ww/article/Add-Remove-Antivirus-components

Thanks for the reply.
I have uploaded a attachment

[b]Repair & Clean Install of Avast → https://goo.gl/t7aJGq[/b]
Repair Avast:
Open the Avast User Interface > Menu > Settings > Troubleshooting > Repair App. > Restart the Computer or,
Control Panel> Program and Features (Add/remove program)>Select Avast> Select Repair. Reboot when completed
https://www.avast.com/faq.php?article=AVKB204

If Repair doesn’t fix the problem, try the following:
If your Avast settings are not the default settings and you want them restored after the Clean Install, follow this before removing Avast.
https://goo.gl/TXjM7h
Clean Install of Avast:
https://goo.gl/4Ptzkf
If you need additional help with the Clean Install, watch this:
https://youtu.be/p-h3myRD51A