Error when installing Easyshop Ver 1.14

HI, I am trying to install easyshop on a fresh install of Joomla 3.8.7 but I get a error saying ;

Notice
The alias product-category is already being used by Product category menu item in the EasyShop Menu menu (remember it may be a trashed item).
×
Warning
JInstaller: :Install: Error SQL Index column size too large. The maximum column size is 767 bytes.
Extension Install: SQL error processing query: DB function failed with error number 1709
Index column size too large. The maximum column size is 767 bytes.
SQL =
CREATE TABLE IF NOT EXISTS `#__easyshop_customfields` (
`id` INT(10) UNSIGNED NOT NULL AUTO_INCREMENT,
`group_id` INT(10) UNSIGNED NOT NULL DEFAULT '0',
`name` VARCHAR(255) NOT NULL DEFAULT '',
`alias` VARCHAR(255) NOT NULL DEFAULT '',
`state` TINYINT(1) NOT NULL DEFAULT '1',
`type` CHAR(20) NOT NULL DEFAULT 'TEXT',
`default_value` TEXT,
`required` TINYINT(1) UNSIGNED NOT NULL DEFAULT '0',
`created_date` DATETIME NOT NULL DEFAULT '0000-00-00 00:00:00',
`created_by` INT(10) UNSIGNED NOT NULL DEFAULT '0',
`checked_out` INT(10) UNSIGNED NOT NULL DEFAULT '0',
`checked_out_time` DATETIME NOT NULL DEFAULT '0000-00-00 00:00:00',
`ordering` INT(10) UNSIGNED NOT NULL DEFAULT '1',
`params` TEXT,
`reflector` TEXT,
`protected` TINYINT(1) UNSIGNED NOT NULL DEFAULT '0',
`rules` TEXT,
`showon` TINYINT(1) NOT NULL DEFAULT '-1',
`attributes` TEXT,
`categories` TEXT,
`checkout_field` TINYINT(1) UNSIGNED NOT NULL DEFAULT '0',
`field_name` VARCHAR(225) NOT NULL DEFAULT '',
PRIMARY KEY (`id`),
KEY `idx_state` (`state`),
KEY `idx_group_id` (`group_id`),
KEY `idx_protected` (`protected`),
KEY `idx_checkout_field` (`checkout_field`),
KEY `idx_field_name` (`field_name`)
)
ENGINE = InnoDB
DEFAULT CHARSET = utf8mb4
DEFAULT COLLATE = utf8mb4_unicode_ci;


It will not let me install it, never seen this problem before, any ideas on what ncan be happening?
Thanks
Gerald