Fatal error: Uncaught TypeError: FreshRSS_CategoryDAO::findFeed():

[math-GH]

With FreshRSS 1.21.1-dev I got this error:

Fatal error: Uncaught TypeError: FreshRSS_CategoryDAO::findFeed(): 
Argument #2 ($feed_id) must be of type int, FreshRSS_Feed given, called in foo\bar\extensions\xExtension-HelloWorld\views\helpers\index\normal\entry_header.phtml on line 29 and 
defined in foo\bar\app\Models\CategoryDAO.php:412 Stack trace: 
#0 foo\bar\extensions\xExtension-HelloWorld\views\helpers\index\normal\entry_header.phtml(29): FreshRSS_CategoryDAO::findFeed(Array, Object(FreshRSS_Feed)) 
#1 foo\bar\lib\Minz\View.php(89): include('C:\\Software\\Int...') 
#2 foo\bar\lib\Minz\View.php(139): Minz_View->includeFile('/views/helpers/...') 
#3 foo\bar\app\views\index\normal.phtml(77): Minz_View->renderHelper('index/normal/en...') 
#4 foo\bar\lib\Minz\View.php(89): include('C:\\Software\\Int...') 
#5 foo\bar\lib\Minz\View.php(111): Minz_View->includeFile('/views/index/no...') 
#6 foo\bar\app\layout\layout.phtml(70): Minz_View->render() 
#7 foo\bar\lib\Minz\View.php(89): include('C:\\Software\\Int...') 
#8 foo\bar\lib\Minz\View.php(102): Minz_View->includeFile('/layout/layout....') 
#9 foo\bar\lib\Minz\View.php(69): Minz_View->buildLayout() 
#10 foo\bar\lib\Minz\Dispatcher.php(56): Minz_View->build() 
#11 foo\bar\lib\Minz\FrontController.php(58): Minz_Dispatcher->run() 
#12 foo\bar\p\i\index.php(57): Minz_FrontController->run() 
#13 {main} thrown in foo\bar\app\Models\CategoryDAO.php on line 412