Please try verifying game files through Steam. Here's how that's done:
https://support.steampowered.com/kb_article.php?ref=2037-QEUH-3335
If that doesn't help, please make a report on our support forum so we can investigate what's up
https://forum.paradoxplaza.com/forum/forums/support-bug-reports.879/
https://support.steampowered.com/kb_article.php?ref=2037-QEUH-3335
If that doesn't help, please make a report on our support forum so we can investigate what's up
https://forum.paradoxplaza.com/forum/forums/support-bug-reports.879/