Does anyone know how to fix this 'cross-origin Request blocked' error - firefox

Cors-origin Request Blocked
I got this server error when I tried to log into the system using a static IP address through the Firefox browser. Does anyone know how to fix this 'cross-origin Request blocked' error.

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Forbidden 403 Access URL API in Laravel

Good afternoon, let me ask
I created a service API using Laravel, but one of the API urls when I sent the response parameter was 403 or Forbidden. even though before it was fine, it worked smoothly. And I raised it to the server instead it became Forbide. Anyone know why? thank you for answering
If it is ok on local and getting a forbidden error on the server, the problem might be caused by the webserver application. please take a look at this link.

How to Resolve HTTP Status 400 - Bad Request

I am trying to access an URL to an application provided by my organisation (will not be able to disclose URL). Majority of my colleagues are able to access it fine. However, I keep encountering the "HTTP Status 400 - Bad Request" error.
I have tried the fixes from https://www.itpro.com/infrastructure/network-internet/359323/what-is-http-error-400-and-how-do-you-fix-it but this issue still persists. I have tried accessing it when connected to external and corporate network and using different types of browsers.
Any idea how can I resolve it?

Error: Econnrefured when connect to localhost

Hi I'm new to postman and I have this problem connecting to local host.
I made a POST request to localhost:3000 and it keeps showing error: connect econnrefuse 127.0.0.1:3000.
I have tried to check and uncheck the Use the system proxy and also add a custom proxy.
It still doesn't work.
Could someone please help me? Thanks
this is the error
2
postman proxy

Google application marketplace API does not work

We use Google API https://www.googleapis.com/appsmarket/v2/licenseNotification/appId endpoint and it works some time, but for now it returns 503 response with error message
{"error":{"errors":[{"domain":"global","reason":"backendError","message":"Temporary error. Please try later."}],"code":503,"message":"Temporary error. Please try later."}}
Could anyone suggest what it can be and how to fix this problem?

Error in WebRequest

I'm working with WebClient for some time now. (using the Mango SDK)
Each time I have an error, the error message is always "Not Found". Either the error is due to login problem, server or page not found. Any error code >= 400 cause the same Exception with the same message and no data.
I tried to use the WebRequest/WebResponse but it seems the problem is always the same.
I mean, I know how to write it correctly in C# (for desktop), but on windows phone, I have no way to access the error code nor the response body.
I found many posts talking about the problem, but no solutions are pointed.
Does anyone have a solution or a workaround (even a dirty one...) I'm open to any suggestion.
That (very misleading) error is often caused by an underlying HTTP error.
If you are using HTTPS, it could be because it's a self-signed (or otherwise unsupported) certificate. You can temporarily get around this by emailing the certificate to an account on the phone, but this won't fly in the marketplace.
If the requests aren't HTTPS, you can run Fiddler to find out what the underlying error is. (Pro tip: The WP emulator will only the use Fiddler if Fiddler was running when it started up so you may have to close it down).
To access the data, you need to get the WebException (it may be the InnerException of what is being thrown) and then you can access the Response

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