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Deprecated: Illuminate\Support\LazyCollection::filter(): Implicitly marking parameter $callback as nullable is deprecated, the explicit nullable type must be used instead in /var/www/html/ojs/lib/pkp/lib/vendor/laravel/framework/src/Illuminate/Collections/LazyCollection.php on line 430
Deprecated: Illuminate\Support\LazyCollection::first(): Implicitly marking parameter $callback as nullable is deprecated, the explicit nullable type must be used instead in /var/www/html/ojs/lib/pkp/lib/vendor/laravel/framework/src/Illuminate/Collections/LazyCollection.php on line 454
Deprecated: Illuminate\Support\LazyCollection::last(): Implicitly marking parameter $callback as nullable is deprecated, the explicit nullable type must be used instead in /var/www/html/ojs/lib/pkp/lib/vendor/laravel/framework/src/Illuminate/Collections/LazyCollection.php on line 734
