Happens with latest Matomo version.

Error: {"message":"Piwik\DataTable\Row::setSubtable(): Argument #1 ($subTable) must be of type Piwik\DataTable, Piwik\DataTable\Map given, called in plugins/Referrers/DataTable/Filter/SetGetReferrerTypeSubtables.php on line 86","file":"core/DataTable/Row.php","line":314,"request_id":"21ab3","backtrace":" on core/DataTable/Row.php(314)\n#0 plugins/Referrers/DataTable/Filter/SetGetReferrerTypeSubtables.php(86): Piwik\DataTable\Row->setSubtable(Object(Piwik\DataTable\Map))\n#1 core/DataTable.php(532): Piwik\Plugins\Referrers\DataTable\Filter\SetGetReferrerTypeSubtables->filter(Object(Piwik\DataTable))\n#2 core/DataTable/Map.php(109): Piwik\DataTable->filter('Piwik\\Plugins\\R...', Array)\n#3 plugins/Referrers/API.php(160): Piwik\DataTable\Map->filter('Piwik\\Plugins\\R...', Array)\n#4 [internal function]: Piwik\Plugins\Referrers\API->getReferrerType('all', 'day', '2023-02-07', false, false, false, '1', '0')\n#5 core/API/Proxy.php(244): call_user_func_array(Array, Array)\n#6 core/Context.php(28): Piwik\API\Proxy->Piwik\API\{closure}()\n#7 core/API/Proxy.php(335): Piwik\Context::executeWithQueryParameters(Array, Object(Closure))\n#8 core/API/Request.php(267): Piwik\API\Proxy->call('\\Piwik\\Plugins\\...', 'getReferrerType', Array)\n#9 core/API/Request.php(560): Piwik\API\Request->process()\n#10 plugins/Referrers/API.php(208): Piwik\API\Request::processRequest('Referrers.getRe...', Array, Array)\n#11 [internal function]: Piwik\Plugins\Referrers\API->getAll('all', 'day', '2023-02-07', false)\n#12 core/API/Proxy.php(244): call_user_func_array(Array, Array)\n#13 core/Context.php(28): Piwik\API\Proxy->Piwik\API\{closure}()\n#14 core/API/Proxy.php(335): Piwik\Context::executeWithQueryParameters(Array, Object(Closure))\n#15 core/API/Request.php(267): Piwik\API\Proxy->call('\\Piwik\\Plugins\\...', 'getAll', Array)\n#16 plugins/API/API.php(483): Piwik\API\Request->process()\n#17 [internal function]: Piwik\Plugins\API\API->getBulkRequest(Array)\n#18 core/API/Proxy.php(244): call_user_func_array(Array, Array)\n#19 core/Context.php(28): Piwik\API\Proxy->Piwik\API\{closure}()\n#20 core/API/Proxy.php(335): Piwik\Context::executeWithQueryParameters(Array, Object(Closure))\n#21 core/API/Request.php(267): Piwik\API\Proxy->call('\\Piwik\\Plugins\\...', 'getBulkRequest', Array)\n#22 plugins/API/Controller.php(45): Piwik\API\Request->process()\n#23 [internal function]: Piwik\Plugins\API\Controller->index()\n#24 core/FrontController.php(637): call_user_func_array(Array, Array)\n#25 core/FrontController.php(169): Piwik\FrontController->doDispatch('API', false, Array)\n#26 core/dispatch.php(32): Piwik\FrontController->dispatch()\n#27 index.php(25): require_once('c...')\n#28 {main}","safemode_backtrace":"#0 [internal function]: Piwik\Plugins\Cloud\Controller->safemode(Array)\n#1 /core/FrontController.php(637): call_user_func_array(Array, Array)\n#2 /core/FrontController.php(169): Piwik\FrontController->doDispatch('Cloud', 'safemode', Array)\n#3 /core/FrontController.php(100): Piwik\FrontController->dispatch('CorePluginsAdmi...', 'safemode', Array)\n#4 /core/FrontController.php(140): Piwik\FrontController::(Array)\n#5 /core/FrontController.php(196): Piwik\FrontController::(Object(TypeError))\n#6 /core/dispatch.php(32): Piwik\FrontController->dispatch()\n#7 /index.php(25): require_once('/c...')\n#8 {main}"}

POST: {"token_auth":"XYZANONYMIZED","module":"API","method":"API.getBulkRequest","urls":["method=Referrers.getAll"],"idSite":"all","date":"2023-02-07","format":"json","period":"day","filter_limit":"-1"}