This mod creates two opposite enemy forces. Apparently when it tries to create it your mod doesn't like it

The mod Old vs. New Biters (1.0.0) caused a non-recoverable error.
Please report this error to the mod author.

Error while running event old_vs_new_biters::on_init()
The mod Who are you? (1.0.2) caused a non-recoverable error.
Please report this error to the mod author.

Error while running event who-are-you::on_force_created (ID 35)
who-are-you/control.lua:59: attempt to index field '?' (a nil value)
stack traceback:
who-are-you/control.lua:59: in function 'remove_name_text'
who-are-you/control.lua:87: in function 'rescan_names'
who-are-you/control.lua:106: in function <who-are-you/control.lua:104>
stack traceback:
[C]: in function 'create_force'
old_vs_new_biters/control.lua:37: in function 'createForces'
old_vs_new_biters/control.lua:24: in function <old_vs_new_biters/control.lua:19>