database error

hi, we are installing your great plugin but we have an error:
Message: Failed to perform query “CREATE TABLE IF NOT EXISTS WordPress10701_wp_redirection_items (
id int(11) unsigned NOT NULL AUTO_INCREMENT,
url mediumtext NOT NULL,
regex int(11) unsigned NOT NULL DEFAULT ‘0’,
position int(11) unsigned NOT NULL DEFAULT ‘0’,
last_count int(10) unsigned NOT NULL DEFAULT ‘0’,
last_access datetime NOT NULL DEFAULT ‘0000-00-00 00:00:00’,
group_id int(11) NOT NULL DEFAULT ‘0’,
status enum(‘enabled’,’disabled’) NOT NULL DEFAULT ‘enabled’,
action_type varchar(20) NOT NULL,
action_code int(11) unsigned NOT NULL,
action_data mediumtext,
match_type varchar(20) NOT NULL,
title text,
PRIMARY KEY (id),
KEY url (url(191)),
KEY status (status),
KEY regex (regex),
KEY group_idpos (group_id,position),
KEY group (group_id)
) DEFAULT CHARACTER SET utf8mb4 COLLATE=‘’”
Installed: –
Next: 2.4
Debug:

Unknown collation: ‘‘’’
La tabla “WordPress10701_wp_redirection_items” no existe
La tabla “WordPress10701_wp_redirection_groups” no existe
La tabla “WordPress10701_wp_redirection_logs” no existe
La tabla “WordPress10701_wp_redirection_404” no existe
Stage: create_tables

we never had this error installing your plugin. where is the problem? do we have it in our datase?

thank you