Hi @pfefferle
I do have All in one security plugin removed and checked below.
I have installed the ActivityPub plugin and required other plugins ( Friends, Hum, Webfinger) are installed.
https://snipboard.io/dIxmSf.jpg
I do have created the [email protected] account and added it as friend
https://snipboard.io/sjRQXa.jpg
And created the posts below according to me these posts should be shown on mastadon.social account also but it seems not showing.
https://snipboard.io/KxT9yS.jpg
Friends > feeds – Show posts on friends page is checked and clicking Refresh it gives the error
https://snipboard.io/idW6BY.jpg
Fatal error: Uncaught TypeError: openssl_pkey_get_details(): Argument #1 ($key) must be of type OpenSSLAsymmetricKey, bool given in C:\laragon\www\aios021023\wp-content\plugins\activitypub\includes\class-signature.php:99 Stack trace: #0 C:\laragon\www\aios021023\wp-content\plugins\activitypub\includes\class-signature.php(99): openssl_pkey_get_details(false) #1 C:\laragon\www\aios021023\wp-content\plugins\activitypub\includes\class-signature.php(65): Activitypub\Signature::generate_key_pair_for(-1) #2 C:\laragon\www\aios021023\wp-content\plugins\activitypub\includes\class-signature.php(48): Activitypub\Signature::get_keypair_for(-1) #3 C:\laragon\www\aios021023\wp-content\plugins\activitypub\includes\class-signature.php(188): Activitypub\Signature::get_private_key_for(-1) #4 C:\laragon\www\aios021023\wp-content\plugins\activitypub\includes\class-http.php(76): Activitypub\Signature::generate_signature(-1, 'get', 'https://mastodo...', 'Fri, 06 Oct 202...') #5 C:\laragon\www\aios021023\wp-content\plugins\activitypub\includes\functions.php(25): Activitypub\Http::get('https://mastodo...') #6 C:\laragon\www\aios021023\wp-content\plugins\friends\feed-parsers\class-feed-parser-activitypub.php(417): Activitypub\safe_remote_get('https://mastodo...', 1) #7 C:\laragon\www\aios021023\wp-content\plugins\friends\includes\class-feed.php(208): Friends\Feed_Parser_ActivityPub->fetch_feed('https://mastodo...', Object(Friends\User_Feed)) #8 C:\laragon\www\aios021023\wp-content\plugins\friends\includes\class-user.php(483): Friends\Feed->retrieve_feed(Object(Friends\User_Feed)) #9 C:\laragon\www\aios021023\wp-content\plugins\friends\includes\class-user.php(469): Friends\User->retrieve_posts_from_feeds(Array) #10 C:\laragon\www\aios021023\wp-content\plugins\friends\includes\class-admin.php(347): Friends\User->retrieve_posts_from_active_feeds() #11 C:\laragon\www\aios021023\wp-includes\class-wp-hook.php(310): Friends\Admin->admin_refresh_friend_posts('') #12 C:\laragon\www\aios021023\wp-includes\class-wp-hook.php(334): WP_Hook->apply_filters('', Array) #13 C:\laragon\www\aios021023\wp-includes\plugin.php(517): WP_Hook->do_action(Array) #14 C:\laragon\www\aios021023\wp-admin\admin.php(259): do_action('friends_page_fr...') #15 {main} thrown in C:\laragon\www\aios021023\wp-content\plugins\activitypub\includes\class-signature.php on line 99