I've had the exact same issue as the original poster, It happened after I downloaded that last launcher patch, The launcher itself loads, but not the spot for the login info, in place of the login prompt is the error that the original poster said.

Have tried reactivating licenses on the ps4. Did not fix the problem.
I also tried reinstalling the entire game and expansion, Still same problem.

Problem has still been happening for 5 days now after the launcher updates to its current version, Not able to log in and patch the game at all.