Encountering a bug when updated 1.6.0

[Frosty_Games_]

Okay so I had a game that I was working on during 1.2.0. I gave up on it a long time ago. But now I want to keep working on it. So I updated to 1.6.0 and started to make some changes and then clicked Playtest. But now I get this bug everytime I try to play it (Even without plugins):

If anyone can help it would be greatly appreciated

 

[Nightblade50]

Try switching to 1.5.1 or 1.5.2, 1.6 has many problems

 

[Aloe Guvner]

To add to what Thomas Smith said, the developers have decided that v1.5.2 is the default "stable" version of MV right now. However, you are still welcome to keep using v1.6.0 (I am using v1.6.0, for example).
However, the problems that are in v1.6.0 are not related to the error message shown here.

For the error, this occurs when you haven't properly updated your project files after upgrading the version, particularly the index.html file.

Follow the instructions closely on how to update the project files:
https://forums.rpgmakerweb.com/index.php?threads/rpg-maker-mv-1-6-0-and-gene.91649/

There are nearly a dozen posts on this forum for the same issue, here are a few for reference:
https://forums.rpgmakerweb.com/index.php?threads/1-6-0-errors-and-how-to-fix-them.91733/
https://forums.rpgmakerweb.com/index.php?threads/what-happened-to-my-playtest.83553/
https://forums.rpgmakerweb.com/inde...ned-every-time-i-try-to-run-my-project.79718/
https://forums.rpgmakerweb.com/index.php?threads/1-6-0-update-trouble.91846/

 

[Frosty_Games_]

Thanks :}

 

[Frosty_Games_]

One more question, How do I downgrade RPG Maker MV

 

[Nightblade50]

One more question, How do I downgrade RPG Maker MV

Are you using the Steam version or the standalone version, found here on this site?

 

[Frosty_Games_]

nevermind i downgraded.