I have the same issue, contacted ProConnect but the rep was not able to solve the problem. 

Applied For

https://proconnect.intuit.com/community/lacerte-diagnostics/56438/ta-p/208248

Now using "Applied For" is no longer an option, I get a critical error.

@IntuitGabi  could get us some help. The article mentioned above does not seem to be working. Maybe you can get someone higher up the food chain, since support does not seem to be of much help.

Those foreign partners are required to have an ITIN if they are not eligible for SSN.

Intuit's suggestion to use "Applied For" is misplaced because ITIN application should then, indeed, be submitted for each of those partners.

The IRS probably tightened the MeF rules to now reject returns without a valid TIN.