Importing VAT Exempt bills not working

Just wanted to state that when trying to import a bill with 0 VAT, the transaction and payment connected to it won't appear and the email message says "Import Failed. Error: the tax_id field is required" (tax_id column doesn't really exist). Even if I export an already existent bill and then try to re-import it, the same error appears. Thanks in advance.
Edward

Hello Edward,

Thank you for your feedback. However, we could not reproduce any issue on our end nor from other customers. There was a similar issue regarding import before but we have solved it. Could you please make sure your Akaunting version is up to date if so could you please try these steps on a fresh company again?

The Akaunting we have in our servers is updated and I'm also using a company in the online version but it isn't working with neither of them, I tried to make another example bill, export it and try to re-import it again but the transaction and payment still don't appear because import failed. If you want I can send you the file.