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WinCC WebUX No Connection to server

Created by: AutoGen_7030793 at: 3/13/2025 11:21 AM (10 Replies)

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3/13/2025 11:21 AM	Rate (0)
AutoGen_7030793 Joined: 1/24/2025 Last visit: 4/10/2025 Posts: 4 Rating: (0)	Dear Experts, When I try to access WebUX from MS Edge, I get error "No connection to server, Automatic reconnect in XX seconds" (Attached photo) I am using WinCC v8.0 Upd 6 and I tried the following settings Run Web configurator wizard and created certificate Activated my project and is in runtime. When I try to access the webpage in MS Edge browser, by typing SERVER1 (My PC name), I get the above mentioned error. I even created a new project from scratch with all the settings and the error remains. I tried removing and re installing the IIS from roles wizard but no luck. Am I missing any other setting? Please let me know. Please help. Attachment WebUXerror.jpg (312 Downloads)

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3/13/2025 12:22 PM	Rate (1)
ElonksuM Experienced Expert Joined: 5/6/2022 Last visit: 11/27/2025 Posts: 589 Rating: (123)	Hi AutoGen_7030793, In order to narrow down the problem, it would be important if you could share the following information with us: - If accessed locally, that is, from the WebUX Server's own web browser, does the same occur? - If you use another web browser, such as Microsoft Edge, does the same occur? Please perform this quick test to rule out a problem with the web browser used. - Exact version of the WinCC/WebUX Server component installed, including updates if applicable. You can see it in the Windows 'Programs and Features' application. - Is an antivirus or firewall enabled on the WebUX Server? - Has it ever worked? We look forward to your response.
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3/14/2025 1:45 PM	Rate (0)
AutoGen_7030793 Joined: 1/24/2025 Last visit: 4/10/2025 Posts: 4 Rating: (0)	Hi Elon, Thanks for your reply. Please find my reply below - If accessed locally, that is, from the WebUX Server's own web browser, does the same occur? - I understand that you're asking me to access WebUX from the browser in the Server PC. Yes I did that and that screenshot is from the Server PC only. - If you use another web browser, such as Microsoft Edge, does the same occur? Please perform this quick test to rule out a problem with the web browser used. - I'll install another browser and update you know soon. - Exact version of the WinCC/WebUX Server component installed, including updates if applicable. You can see it in the Windows 'Programs and Features' application. - I installed WebUX along with WinCC v8.0 then updated with Update 6. Anyways, I'll check and post the screenshot soon. - Is an antivirus or firewall enabled on the WebUX Server? - I didn't install antivirus yet. I disabled all firewalls already including the defender. - Has it ever worked? - Good question. Yes it worked only once when I installed WinCC v8.0 and WebUX the first time including the Update 6. After that, I did creation of Server data, Redundancy settings and duplicating project to second server. Now, it's not working anymore. It's not working in the second server also. I'll update you soon on point 2 and 3. Thanks again.

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3/17/2025 6:18 AM	Rate (0)
AutoGen_7030793 Joined: 1/24/2025 Last visit: 4/10/2025 Posts: 4 Rating: (0)	Hi Elon, Greetings. I have few updates Point no. 2 - I tried installing Google chrome on Server-1 PC. But the problem still remains "No connection to server" Point no. 3 - I attached a screenshot for the version of WinCC and WebUX Please help. Thanks. Attachment web ux version.jpg (254 Downloads)

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3/19/2025 10:44 AM	Rate (1)
Murof Platinum Expert Joined: 8/3/2009 Last visit: 12/19/2025 Posts: 16612 Rating: (1943)	Hello AutoGen_7030793 Do you have configured WebUX and Webnavigator Server on you WinCC System or just WebUX? Check the ISS if he WebUX Website is runnig properly. Click on the Websites folder and you can see the websites in the detail window on the right side. here check if its is started and check the Binding to the Port number. Which port Number do you use? and does another website also use this portnumber? Check also the Binding dialog and if you have added a IP or if you have only set the computername for the access. Also if the connect SSL certificate is selected. (show it also and check if all is correct) Bye Murof
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3/27/2025 11:57 AM	Rate (0)
AutoGen_7030793 Joined: 1/24/2025 Last visit: 4/10/2025 Posts: 4 Rating: (0)	Hello Murof, I have installed both WebUX and WebNavigator. But I've configured only WebUX. I've checked the ISS, the website is running properly. I am using default port 443. I didn't add any IP or PC name there. It's just assigned as "All Unassigned" which was by default. I tried adding IP address of the server but still it didn't work. You can see my screenshot in attachment. Please advice. Thank you. Attachment IIS-3.jpg (238 Downloads)

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4/1/2025 12:48 PM	Rate (0)
AutoGen_6792315 Joined: 4/1/2025 Last visit: 4/1/2025 Posts: 1 Rating: (0)	I've got the same issue with the exception mine did work but I've upgraded to v8 update 7 and now its broken. can't for the life of me figure out what's broken

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4/3/2025 9:27 AM	Rate (0)
Murof Platinum Expert Joined: 8/3/2009 Last visit: 12/19/2025 Posts: 16612 Rating: (1943)	Hello it looks everything OK... no idea what could be the reasons. Do you have already opened a Service Request at SIemens Support for this issue? Bye Murof
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12/11/2025 6:43 PM	Rate (0)
Máximus_Décimus_M... Joined: 9/24/2025 Last visit: 12/11/2025 Posts: 2 Rating: (0)	AutoGen, news? I'm with a similar problem in the V8.1.0.0.

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12/15/2025 8:12 AM	Rate (0)
@Gafer@ Member Joined: 3/21/2020 Last visit: 12/21/2025 Posts: 1 Rating: (0)	I have the same issue with V8.1 on Windows Server 2019 AutoGen did you solved the problem? Thank you

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