After accepting the Intelligence Coalition treaty in an alliance and ending the turn afterwards, the game softlocks in the process of loading the next turn.

When refusing the treaty this doesnt happen.

Singleplayer fast speed with one opponent, playing as the Joseon in the early modern era while not owning any stealth units of my own.

Vanilla Improvement Pack is the only active mod, and its creator confirmed its a vanilla bug. [mod version: 4.12]

The next turn started, but keeps on loading forever.

Dont know if its related, but in the turn where I accepted the treaty, the curiousity icon didnt disappear after collecting them.

auto-save 881.ctr

auto-save 882.ctr

Diagnostics (2023'05'21 @1555'07''695''').zip

Player.log

DxDiag.zip