I have OJS 3.3.0.3 and the sidebar is there. You need to check if there are any errors from the browser. Press F12 on your keyboard then select the “console” tab to see if the browser generates any errors.
Thanks I did. Here is the error:
jquery.min.js?v=3.2.1.3:2 [Deprecation] Synchronous XMLHttpRequest on the main thread is deprecated because of its detrimental effects to the end user’s experience. For more help, check https://xhr.spec.whatwg.org/.
send @ jquery.min.js?v=3.2.1.3:2
Does it help if clicking on a symbol on the upper left side of the page? The dropdown menu with a list of journals should appear. You are probably on a site level page according to the screenshot.