How to migrate MCMA to AMP minecraft world

Product: AMP

Is there a correct way to migrate my modded Minecraft Forge world from McMyAdmin to AMP?

I tried just copying the world files, but it seems all the blocks got mixed up, and the game is crashing… grass blocks turned into stairs, water blocks changed into other liquids; the world has turned into chaos.

You’d want to import the server using SFTP to prevent file permission issues.
AMP has built-in SFTP, you connect by grabbing a link from the upper right of the file manager, with the username/password being your panel credentials. (using WinSCP or FileZilla)
There’s a guide you can follow here that outlines importing a server:
https://discourse.cubecoders.com/t/how-to-import-an-existing-minecraft-server-into-amp/1822
Then there’s a Forge FAQ here if you run into anything weird:
https://discourse.cubecoders.com/t/forge-frequently-asked-questions/2982/1