Stopped updating

Are you saying that you are unable to download the latest definition updates?

Could this empty page that you are seeing be caused be a 500 error that might be explained my examining the error_log files on your server?

I cannot say what might be causing this without more information but I am willing to help you figure out that cause and find a solution if you can check the log files and produce any relevant error messages that might help us to understand the problem better.

Thank you @scheeeli

is it possible to have problem with litespeed server?

I will check for errors

Sure, anything is possible, but I don’t think that litespeed has anything directly to do with the problem you are having. It is most likely a conflict with some other code on your site, or a restriction on the server that is preventing certain URLs, or else a configuration issue. But the only way to be sure of what the problem is and figure out what is causing it is to find the relevant error in the error_log files.

HTTP ERROR 406

Yeah, I’m not sure where you are seeing that but that is not enough information to help diagnose the cause of this issue.

The error_log files will have detailed information about what script was being executed when the error was triggered and usually even points to what line of code triggered this error. That is what we need to see.

A 406 error generally mean “Not Acceptable”, which does indicate that your server is blocking the request for some reason. Hopefully your error_log file will have more info but you could also ask your hosting provider about this to see if there is some reason that they would be blocking this URL from Posting the update data to your website.