For some reason, the DropBox app on my laptop stopped syncing. Everytime I clicked on the app in the system tray, it kept saying that it was trying to connect. I couldn’t ever figure out why it was giving me that problem, so I tried uninstalling the app and then reinstalled it.
When I reinstalled the app, DropBox gave me a No Internet Connection error, even though I knew certainly well that I was connected to the internet. Briefly, I thought it was because I had Lan Sync turned on. So, I tried turning that off, but that didn’t resolve the issue. I then turned Lan Sync back on, which is how I originally had it, and then connected my laptop to the network via network cable. I thought maybe it needed a hardwire connection for some reason, rather than wifi. That didn’t resolve the issue. I tried checking firewall options, ports, and security, but nothing there seemed ok.
After some moderate googling of the issue, I found the resolution at the bottom of this thread. The funny thing is that they, too, suggested that the original poster try all sorts of settings and security tweaks. But it turns out, all he and I had to do was change the Proxies setting in DropBox.
For Windows users, you can find the settings by clicking on the DropBox icon in your system tray. Then, hit the gear icon and select Preferences. The default is to open you up to the General Tab. Go to the Proxies tab, which is the furthest on the right.
Somehow, my Proxies settings had switched to Auto-detect. All I had to do was switch it back to No proxy and hit Apply, and things went back to normal. The DropBox app on my laptop was now seeing that I had to sync files (over 5,000 of them, so it had been longer than I had thought since the issue occurred). Now, things are running just fine again.