> Unknown collation: 'utf8mb4_unicode_520_ci'
Try this:
1) Click the “Export” tab for the database
2) Click the “Custom” radio button
3) Go the section titled “Format-specific options” and change the dropdown for “Database system or older MySQL server to maximize output compatibility with:” from NONE to MYSQL40.
4) Scroll to the bottom and click “GO”.
If it’s related to wordpress, more info on why it is happening.
