Found a workaround:
I downloaded the RPGM2003 RTP from the official website, here: https://www.rpgmakerweb.com/run-time-package
Then I opened the downloaded Installer.exe with 7z.zip as an archive.
Navigated to rpg2003_rtp_installer.exe\CharSet
Copied the file "Vehicles.png" to [Professor Frippel's game directory]\CharSet
And the game works now. There's a "vehicle.png" in the game's CharSet folder, but capitalizing it doesn't seem to fix anything. I had to add the new one to get it to work.
1.0.4 adds the Vehicle file in the folder, hopefully fixing this issue.
However... 1.0.3 is an unplayable version. I apologize sincerely for that. The player's starting position is WRONG, that is because I uploaded a test version by accident.
Version 1.0.4 fixes that, but you will have to start the game from scratch in the new version as the save file from 1.0.3 will be unusable.
Thank you for visiting this page, I hope you'll be able to play the game as intended now! Please let me know if you find any more issues!
