Creating Fluid Field: PHP Errors

http://ee400.dev/admin.php?/cp/fields/create

Created a new Fluid Field but didn’t check any checkbox options. Got a page with a bunch of PHP errors:

Notice Undefined index: field_channel_fields ee/EllisLab/Addons/fluid_field/ft.fluid_field.php, line 439 Severity: E_NOTICE

Notice Undefined index: field_channel_fields ee/EllisLab/Addons/fluid_field/ft.fluid_field.php, line 439 Severity: E_NOTICE

Warning Cannot modify header information - headers already sent by (output started at ee/legacy/core/Exceptions.php:111) ee/legacy/core/Input.php, line 233 Severity: E_WARNING

Warning Cannot modify header information - headers already sent by (output started at ee/legacy/core/Exceptions.php:111) ee/legacy/libraries/Functions.php, line 392 Severity: E_WARNING