Fatal Error when publishing comments

Hello, ActivityPub 1.0.0 shows me a fatal error message when I publish a comment on my own blog. But others do not see the error (even myself, publishing on my own web without logging in, gives no error).

This is the error coming:

Fatal error: Uncaught TypeError: Argument 1 passed to Activitypub\Transformer\Post::transform() must be an instance of WP_Post, string given, called in /home/customer/www/plusbrothers.net/public_html/wp-content/plugins/activitypub/includes/model/class-post.php on line 37 and defined in /home/customer/www/plusbrothers.net/public_html/wp-content/plugins/activitypub/includes/transformer/class-post.php:93 Stack trace: #0 /home/customer/www/plusbrothers.net/public_html/wp-content/plugins/activitypub/includes/model/class-post.php(37): Activitypub\Transformer\Post::transform(‘27281’) #1 /home/customer/www/plusbrothers.net/public_html/wp-content/plugins/friends/feed-parsers/activitypub/class-comment.php(107): Activitypub\Model\Post->__construct(‘27281’) #2 /home/customer/www/plusbrothers.net/public_html/wp-content/plugins/friends/feed-parsers/class-feed-parser-activitypub.php(1690): Activitypub\Model\Comment->__construct(555) #3 /home/customer/www/plusbrothers.net/public_html/wp-includes/class-wp-hook.php(310): Friends\Feed_Parse in /home/customer/www/plusbrothers.net/public_html/wp-content/plugins/activitypub/includes/transformer/class-post.php on line 93

My hosting is SiteGround. I had also the webfinger not working -known issue- but resolved it by uploading a json file with author’s information, on the .well-known folder.

Please help, because, the comments show up anyway but it’s annoying

thanks

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