It will show you some useful solutions.
Such problems are usually triggered by incorrect web link proxy options on the computer.
Learn how to troubleshoot Internet connection problems with these 11 tips incl.
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WiFi connected but no Internet Windows 10, router not connecting to Internet.
How to Fix the Internet Only Works in One online window Error?
It can help fix issues with Microsoft Store or any other Microsoft Windows Store apps.

Step 2: Click theTroubleshoottab from the left pane.
Step 3: ClickWindows Store Appson the right side and clickRun the troubleshooter.
Step 4: Now, the Windows Store troubleshooter will automatically scan the system for issues.
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Apply the fixes recommended by the Windows Store troubleshooter.
Then check to see if the Internet only works in one web client issue is fixed.
Receive “an error occurred while troubleshooting” message when using Windows Troubleshooters to fix some issues?

Here are 8 helpful ways to fix it.
Disable VPN
First, pop kick open the VPN client and then disconnect from the internet.
Now, open Microsoft Store and peek if the apps are able to connect to the internet.

If not, then have a go at shut down the Firewall.
Disable Firewall
Step 2: Click theWindows Securitytab from the left pane.
Step 3: ClickFirewall and internet protectionfrom the right pane.
Step 4: Choose your currently active web connection and then switch the toggle toOffunderWindows Defender Firewall.
Before you do that, try this.
Step 1: Turn on the hotspot on your smartphone.
Step 2: Connect your box to this hotspot.
Step 3: spin up the Microsoft Store app or a web web app with a proxy error.
Now you might peek if it works.
If not, try the following steps.
Disable Proxy for LAN
Step 1: Press theWinkey +Rkey to openRun.
Step 2: Typecontroland clickOKto openControl Panel.
Step 3: In the path bar, selectAll Control Panel Items.
Step 4: Now chooseInternet Options.
Step 5: In theInternet Propertieswindow, click theConnectionstab.
Step 6: ClickLAN settingsunderLocal Area internet (LAN) controls.
Step 8: ClickOKto save the changes.
Disconnect and then reconnect to your web connection.
Now find out if the Internet only works in one web app issue disappears.
If you want to solve this issue, try the solutions mentioned above.