Mautic 4: When applying a migration at CLI there is an error from ConsoleErrorListener

[RCheesley]

Bug Description

While testing a PR I had to apply a migration which threw an error:

ruth.cheesley@MacBookPro-RuthCheesley mautic % ddev exec bin/console migrations:execute --up 20200810153131

In ConsoleErrorListener.php line 46:
                                               
  Call to a member function getName() on null  
                                               

ERROR: 255
Failed to execute command bin/console migrations:execute --up 20200810153131: exit status 255

Q	A
Mautic version	4.0.-alpha1
PHP version	7.4
Browser	Chrome

Steps to reproduce

1. Try to apply a migration at command line with migrations:execute --up VERSION
2. Notice the error