1. Use named routes instead of URLs directly as it makes your application easier to maintain and understand

First, define a named route in your web.php:

Route::get('student/exams/pdf/{student}', 'StudentExamsController@printPDF')->name('student.exams.pdf');

Then, update your Blade template to use the route:

<a class="btn btn-primary" href="{{ route('student.exams.pdf', $singleStudent->id) }}" role="button">View / Print Final Transcript</a>

2. In your Blade template, Handle Potential Null Objects

@if ($singleStudent) <a class="btn btn-primary" href="{{ route('student.exams.pdf', $singleStudent->id) }}" role="button">View / Print Final Transcript</a> @endif

And similarly, check before your foreach loop:

@if ($examsrecordSingle) @foreach ($examsrecordSingle as $key => $student) <!-- Table row --> @endforeach @endif

3. Check relations one more time to be sure it works, as expected