Hi @mable and welcome to the forum!
Glad that you found this announcement. Did you actually try if TANGO works fine after enabling the BIG-EPFL update site as mentioned in that discussion?
As the plugins really only moved from the Fiji update site to the EPFL one, everything should work as expected with the BIG-EPFL update site enabled.
Did you know that on Windows, you can copy a single-window screenshot to the clipboard by pressing AltPrint Screen? You can just paste this into the forum here, no need to go via mobile phone cam
Also, for looking at your exception, it is much more helpful if you simply copy and paste the text from the console window, instead of pasting a screenshot.
@ThomasBoudier @mable please keep the discussion open, your solutions can be helpful for others having the same issue in the future. That’s why we have this forum!