Type not supported - The JSON data is not available before MySQL 5.7.8

Preference doesn't work for me. I use osx with workbench version 8.0.11.
Model in top bar menu -> Model Options -> MySQL then change the version as Shantha's answer works for me.

Previous version of MySQLWorkbench (6.3.10) has better error message for this...

I was able to figure the issue. The default version set for Modeling MySQL was set as 5.6.30. Changed it to 5.7.8 and works the table schema modification.

Go to Edit -> Preferences... in MySQL Workbench

Refer the below screens:

Before:

After: