Crash after trying out find publisher deal

Dear developer,

I just got the following error after trying out the find publisher feature. After this error inititally I am unable to interact with the game. Afterwards it seems I can interact but am unable to unpause the game. Also the wrong menus pop up after interactions.

My load seems to be corrupted and I am unable to revert to an earlier save (keeps on loading the most recent bugged out one). Hereby the error:

Error Uncaught error. Please report this to support@greenheartgames.com: Uncaught TypeError: Cannot call method 'indexOf' of undefined (file:///D:/Games/SteamLibrary/steamapps/common/Game%20Dev%20Tycoon/compressed/codeNw.js:16) Please restart the game.

Enabled Mods:

No mods activated.
Game Version: 1.5.4

Platform: Windows

Distribution: Steam

Sorry for the troubles.
This bug is fixed with version 1.5.5.
Please restart your steam client to make sure that you get the update.