First of all - many thanks for everything you do. I found so many interesting pieces of information here.
That being said, I'm having a hard time with my VAT/VIES number. My old company was based in Italy, and UpWork did validate my old VIES number.
However, I recently moved to Sofia, Bulgaria, and UpWork keeps rejecting my new VIES number - I've tried both the VAT and the VIES number (it's just a two-letter difference) but nothing happened. Also, my VIES number has already been validated by the European Commission website.