Yes, I had the same reply - we’re working on it and we’ll get back to you next week.
I checked the IBAN here:
According to this, it checks out and appears to be the right length for Lithuania. The problem may be that some banks in various countries aren’t used to Lithuanian IBANs.
My French bank demands to know the country when adding the IBAN to a transfer. Lithuania isn’t one of the countries in their drop down menu! So I have to contact them about it directly, which I’m doing next week.
If I get some good news, I’ll report back. 