35% Withholding tax on funds if tax resident in a 'tax haven'?

I have been told by one fund that because I am tax resident in in a country Portugal considers a tax haven, which I see is one of the countries considered a tax haven in Portugal we would be subject to 35% withholding tax. Anyone aware of this?

I did read about this as well, though I didn’t see a list of the countries. Definitely something to consider and good thing you’re doing your homework.