pre-loaded results is mysql error

Thanks for this wonderfull module and your hard work!

I have created a entity reference field to users with the widget "Select2 boxes (Multiple values)".
When I select "Enable pre-loaded entries" this will result in a sql-error:

SQLSTATE[42000]: Syntax error or access violation: 1064 You have an error in your SQL syntax; check the manual that corresponds to your MariaDB server version for the right syntax to use near 'AS 
FROM 
users_field_data preload
LIMIT 99 OFFSET 0' at line 1: SELECT preload.uid AS uid, preload. AS 
FROM 
{users_field_data} preload
LIMIT 99 OFFSET 0