PHP Fatal error: Uncaught TypeError: array_key_exists() - 9.0.1 - 1263
After upgrading to version 9.0.1, the logs are full of the same type of errors (every few minutes):
[proxy_fcgi:error] AH01071: Got error 'PHP message: PHP Fatal error: Uncaught TypeError: array_key_exists(): Argument #2 ($array) must be of type array, null given in /hubzilla/Zotlabs/Lib/Activity.php:1088\nStack trace:\n#0 /hubzilla/Zotlabs/Lib/Activity.php(1088): array_key_exists()\n#1 /hubzilla/Zotlabs/Lib/Activity.php(569): Zotlabs\\Lib\\Activity::encode_person()\n#2 /hubzilla/Zotlabs/Lib/Activity.php(247): Zotlabs\\Lib\\Activity::encode_item()\n#3 /hubzilla/extend/addon/hzaddons/diaspora/Receiver.php(1696): Zotlabs\\Lib\\Activity::fetch_item()\n#4 /hubzilla/addon/hzaddons/diaspora/inbound.php(167): Diaspora_Receiver->like()\n#5 /hubzilla/extend/addon/hzaddons/diaspora/inbound.php(79): diaspora_dispatch()\n#6 /hubzilla/extend/addon/hzaddons/diaspora/Mod_Receive.php(166): diaspora_dispatch_public()\n#7 /hubzilla/Zotlabs/Web/Router.php(274): Zotlabs\\Module\\Receive->post()\n#8 /hubzilla/Zotlabs/Web/WebServer.php(1...'