Thank you for your suggestion. Unfortunately, when I set Word Wrapping to true, Iavra Localization stops working correctly. It uses /n for line breaks.
The problem is that just recently both plugins have worked perfectly together without word-wrap enabled. Perfectly. I have a lot of text… Re-formatting all the text lines will be a hell of the work.
In my test clean project, I have only Yanfly's Core and Yanfly's Message Core, so that shouldn’t be a problem.
My prime suspect is NW.js. I had a problem with this, and found the solution here:
When I go to playtest my game (ive tried several different projects, including new project to see if it did it still) when the playtest pops up it pops up with this alert message: "Profile error occurred Your profile can not be used because it is from a newer version of NW.js. Some features may...
forums.rpgmakerweb.com
Both problems appeared together, so maybe they are connected, or maybe not.