Try the "Clear User Directory" button in your launcher. If the problem persists, please submit a ticket through support.paradoxplaza.com. Apologies for the inconvenience caused.
This thread was added on June 04, 2019, with posts from BjornB, VashTheStampede.
Please note that 1.7 will not be save game compatible with 1.6.2.
You can always roll back to 1.6.2 through the BETAS tab under properties for the game