Fatal error after migrating

I just migrated a WP site 4.9.10 to CP and got this:

Fatal error : Uncaught Error: Call to undefined function classicpress_version() in /home/petethomas/public_html/wp-admin/about.php:23 Stack trace: #0 {main} thrown in /home/petethomas/public_html/wp-admin/about.php on line 23

After refreshing the page did it fix itself?

I have seen this on Forge but the migration still completed and everything was fine after a page refresh.

Seems to be

I think there is an open issue on GitHub about this.

Are you using any caching on the server?

Good question. It is shared hosting so I don’t know the answer cavy specs but it has Litespeed