Please try using a modern browser. Tabs should work in the latest version of Firefox, Opera, Chrome, Safari and Edge. Make sure you do not have any ad or script blockers - these might block JavaScript on the page which explains why you cannot use the tabs (the interaction is JavaScript-based by necessity). If unsure, use
Firefox Portable which is a self-contained copy of Firefox without any extensions running in it by default.
If the problem persists you have a JavaScript error on the page. Either ask me to set this ticket to private or file another private ticket because I'll have to ask you for connection details and troubleshoot this on your server.
Nicholas K. Dionysopoulos
Lead Developer and Director
🇬🇷Greek: native 🇬🇧English: excellent 🇫🇷French: basic • 🕐 My time zone is Europe / Athens
Please keep in mind my timezone and cultural differences when reading my replies. Thank you!