Hi, we are fixing this issue in next update, for now create these two tables manually.

CREATE TABLE IF NOT EXISTS `#__sellacious_seller_timings` (
`id` int(11) NOT NULL AUTO_INCREMENT,
`seller_uid` int(11) NOT NULL,
`type` varchar(50) COLLATE utf8mb4_unicode_ci NOT NULL,
`week_day` int(11) NOT NULL,
`from_time` time NOT NULL DEFAULT '00:00:00',
`to_time` time NOT NULL DEFAULT '00:00:00',
`full_day` tinyint(1) DEFAULT NULL,
`slot_window` int(11) NOT NULL,
`slot_window_unit` varchar(50) COLLATE utf8mb4_unicode_ci NOT NULL,
`today_availability` time NOT NULL DEFAULT '00:00:00',
`state` tinyint(1) NOT NULL DEFAULT 1,
`created` timestamp NOT NULL DEFAULT '0000-00-00 00:00:00',
`created_by` int(11) NOT NULL,
`modified` timestamp NOT NULL DEFAULT '0000-00-00 00:00:00',
`modified_by` int(11) NOT NULL,
`params` text COLLATE utf8mb4_unicode_ci NOT NULL,
PRIMARY KEY (`id`)
) ENGINE=InnoDB DEFAULT CHARSET=utf8mb4 COLLATE=utf8mb4_unicode_ci;

CREATE TABLE IF NOT EXISTS `#__sellacious_product_seller_slot_limits` (
`id` int(11) NOT NULL AUTO_INCREMENT,
`seller_uid` int(11) NOT NULL,
`product_id` int(11) NOT NULL,
`slot_from_time` timestamp NOT NULL DEFAULT '0000-00-00 00:00:00',
`slot_to_time` timestamp NOT NULL DEFAULT '0000-00-00 00:00:00',
`full_day` tinyint(1) NOT NULL,
`slot_limit` int(11) NOT NULL,
`slot_count` int(11) NOT NULL,
`created` timestamp NOT NULL DEFAULT '0000-00-00 00:00:00',
`modified` timestamp NOT NULL DEFAULT '0000-00-00 00:00:00',
PRIMARY KEY (`id`)
) ENGINE=InnoDB DEFAULT CHARSET=utf8mb4 COLLATE=utf8mb4_unicode_ci;



Hope this helps.
Thanks.