I use Windows 10 and Google Chrome
First make sure your windows copy is up to date, if it is you'll see an option to check microsoft website for updates too, click on that and install optional updates as well.
Next check and see if it's your browser, so try edge or firefox. If they work I'd try re-installing chrome.
If the other browsers don't work either try navigating to the galleries using the drop down menu and see if you can post from the gallery section.
Go through all of your drivers and check they are all up to date.
If none of that has worked I'd try restarting your PC in safe mode, load chrome and view the web page, if that works you may have a conflict somewhere.
I have tried Chrome and Edge and tried switching off my ad blocker I cannot do a screen shot for the same reason I cannot upload???