Dreamweaver CC 2020 Real Time Preview opens, but doesn't show real time changes.

Question

Running Windows 10 and Dreamweaver CC 2020. The Real Time Preview WILL launch a browser with the page in it, however it does NOT update as I make changes in code. This is a fresh install of DW 2020. In troubleshooting, I also downloaded the last version (2019) and in that version the Real Time Update DOES work.

I went so far as to completely reinstall my whole PC with fresh Windows 10, fresh Dreamweaver. When I first ran DW the Windows Defender Firewall popped up saying it was blocking access to something, so I ALLOWED the firewall to pass that through. (I even tried turning it off with no change)

Interestingly, the QR code part of Real Time Preview DOES work. I can see text change in real time on a browser on my phone as I change text in code, I just can't do that on browsers on my PC (Edge, Firefox or Chrome).

To recap:

DW 2019 will do the Real Time Preview on my PC

DW 2020 will do the RTP on my phone via the QR code

DW 2020 will not do the RTP on my PC. (it launches the browser with the page displayed, but wont update)

Any Ideas???

alpham56488556 · Accepted Answer

SOLVED (config issue)I think you may have confused Antivirus software with Firewall software. There are no settings in antivirus software to do the kind of blocking or excepting that you suggest (accessing the Internet), that's done in firewalls which isn't the issue here.That being said, there is some blocking going on in the software, but it's not blocking Dreamweaver, rather it's trying to protect the Browsers. This is why the QR code worked with Real Time Preview as that is happening on a browser outside of the computer "protected" by the antivirus software.There are about a hundred or so settings inside of Norton Antivirus and I spent considerable time switching them off and on, one at a time, rebooting, etc.. before I found the cluprit.  The setting causing Dreamweaver Real Time Preview to stop is called "Browser Protection" inside of the "Network" category. See the image below: Fortunately, Norton offers a feature to turn off a feature for a set period of time, 15 minutes, 1hr, Until Restart, or Permenantly. This is helpful as I think they know it causes issues for legitimate things sometimes.  **restarting DW or even rebooting may be required I found when troubleshooting these changes if they don't take effect right away.** Anyway, hopefully this helps the next person.

alpham56488556 · Answer

SOLVED...So, after several hours of Adobe tech folks remotely trying to mess around I discovered a couple things..1. Adobe support staff don't understand what Real Time Preview is supposed to look like. One thought the problem was solved just because a browser launched. The other, thought my CSS file was somehow causing the issue. They changed permissions on folders, were going through the inspect element features of the browser wondering what all the redirects were that Dreamweaver inserts to make RTP function. It was crazy.2. In the end, I uninstalled my Norton Antivirus software and boom, it started working. Obviously there's some feature of NortonAV that's blocking something.  So, that's good, I can use the feature, but I have no antivirus protection. Sigh. Does anyone who ACTUALLY KNOWS how Real Time Preview works provide me with some insights so I might perhaps find a setting in the Norton software to temporarily "turn off" while I'm working in Dreamweaver so I don't have to uninstall and reinstall it each time?

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