Fatal error when trying to sync

I am getting this error in the log.


[06-Apr-2023 21:52:32 UTC] PHP Fatal error: Uncaught Error: Cannot use object of type WP_Error as array in /home3/terrala1/public_html/wp-content/plugins/sync-post-with-other-site/includes/sps_sync.class.php:126

Stack trace:

#0 /home3/terrala1/public_html/wp-includes/class-wp-hook.php(308): SPS_Sync->sps_save_post(15444, Object(WP_Post), true)

#1 /home3/terrala1/public_html/wp-includes/class-wp-hook.php(332): WP_Hook->apply_filters(15444, Array)

#2 /home3/terrala1/public_html/wp-includes/plugin.php(517): WP_Hook->do_action(Array)

#3 /home3/terrala1/public_html/wp-includes/post.php(4715): do_action('save_post', 15444, Object(WP_Post), true)

#4 /home3/terrala1/public_html/wp-includes/post.php(4817): wp_insert_post(Array, true, true)

#5 /home3/terrala1/public_html/wp-content/themes/Hello-child-theme/functions.php(297): wp_update_post(Array, true)

#6 /home3/terrala1/public_html/wp-content/themes/Hello-child-theme/functions.php(348): terra_update_post_excerpt('On March 15, a ...')

#7 /home3/terrala1/public_html/wp-includes/class-wp-hook.php(308): terra_save in /home3/terrala1/public_html/wp-content/plugins/sync-post-with-other-site/includes/sps_sync.class.php on line 126

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