Please log in to your Upwork account and update your status by clicking on the down arrow found on the upper-right corner next to your name and profile picture. A box will appear that will show you the option to do this. Kindly click 'Online'. Let us know if you need further assistance on this. We're here to help.
I checked and it seems that your status is already set to 'Online'. Could you please try clearing your cache and cookies or using a different browser? Let us know if the issue persists so that we can assist you further.
When you select that option, a green circle will show next to your picture in Messages and in Freelancer search as long as you're logged in and actively using one of the site's pages.
I am facing same problem. I have selected online then I even cleared all cache and I even used another browser but I am still facing same problem. It still says 'You are currently working offline'.
I checked but couldn't replicate the issue you are describing. Could you please send us a screenshot of the notification so that we can take a look?