I get these errors in the Latest Activity and Latest Post

Deprecated: json_decode(): Passing null to parameter #1 ($json) of type string is deprecated in /var/www/html/src/Module/Conversation/Network.php on line 170

Deprecated: json_decode(): Passing null to parameter #1 ($json) of type string is deprecated in /var/www/html/src/Content/Widget.php on line 611

Deprecated: json_decode(): Passing null to parameter #1 ($json) of type string is deprecated in /var/www/html/src/Module/Conversation/Network.php on line 349

Warning: Cannot modify header information - headers already sent by (output started at /var/www/html/src/Module/Conversation/Network.php:170) in /var/www/html/src/App/Page.php on line 524

Thanks in advance