Call to a member function getDateStart() on boolean DataTable/Renderer/Rss.php #16918

Error seen on Cloud:

Error: {"message":"Call to a member function getDateStart() on boolean","file":"\/var\/www\/html\/core\/DataTable\/Renderer\/Rss.php","line":62,"request_id":"1e86d","backtrace":" on \/var\/www\/html\/core\/DataTable\/Renderer\/Rss.php(62)\n#0 \/var\/www\/html\/core\/DataTable\/Renderer\/Rss.php(34): Piwik\DataTable\Renderer\Rss->renderTable(Object(Piwik\DataTable\Map))\n#1 \/var\/www\/html\/plugins\/API\/Renderer\/Rss.php(40): Piwik\DataTable\Renderer\Rss->render()\n#2 \/var\/www\/html\/core\/API\/ResponseBuilder.php(193): Piwik\Plugins\API\Renderer\Rss->renderDataTable(Object(Piwik\DataTable\Map))\n#3 \/var\/www\/html\/core\/API\/ResponseBuilder.php(104): Piwik\API\ResponseBuilder->handleDataTable(Object(Piwik\DataTable\Map))\n#4 \/var\/www\/html\/core\/API\/Request.php(272): Piwik\API\ResponseBuilder->getResponse(Object(Piwik\DataTable\Map), 'Actions', 'getPageUrl')\n#5 \/var\/www\/html\/core\/Context.php(28): Piwik\API\Request->Piwik\API\{closure}()\n#6 \/var\/www\/html\/core\/API\/Request.php(273): Piwik\Context::executeWithQueryParameters(Array, Object(Closure))\n#7 \/var\/www\/html\/plugins\/API\/Controller.php(46): Piwik\API\Request->process()\n#8 [internal function]: Piwik\Plugins\API\Controller->index()\n#9 \/var\/www\/html\/core\/FrontController.php(605): call_user_func_array(Array, Array)\n#10 \/var\/www\/html\/core\/FrontController.php(166): Piwik\FrontController->doDispatch('API', false, Array)\n#11 \/var\/www\/html\/core\/dispatch.php(32): Piwik\FrontController->dispatch()\n#12 \/var\/www\/html\/index.php(25): require_once('\/var\/www\/html\/c...')\n#13 {main}"}

URL: https://xyz.matomo.cloud//?module=API&format=rss&pageUrl=%xxxxxxxxxxxxxxxx&idSite=1&period=day&date=last7&token_auth=XYZANONYMIZED&method=Actions.getPageUrl

Referrer:

GET: {"module":"API","format":"rss","pageUrl":"\xxxxxxxxxxxx","idSite":"1","period":"day","date":"last7","token_auth":"XYZANONYMIZED","method":"Actions.getPageUrl","filter_limit":100}

Time: 2020-12-09 09:09:38

Seems that error occurs when filtering for a pageUrl that does not occur in one of the returned periods. Will check if it's easy to fix