Laravel API works locally but not on hosting server

These are my routes:

 Route::post('get_client', 'API\ClientController@ShowClient');
 Route::post('new_loans', 'API\LoanController@ShowNewLoans');
 Route::post('new_loans/{BR_ID}', 'API\LoanController@ShowNewLoans');
 

get_client, but works locally on my personal computer:

 public function ShowClient(Request $request) {
     return response()->json(['message' => 'Okay'], 200);
 }

Below works perfectly locally and on the server:

 public function ShowNewLoans($BR_ID = null) {
     if ($BR_ID == null) {
         $newLoans = Loans::where([
             ['APPLICATION_NO', NULL],
             ['OL_TEMP_APP_NO', '!=', NULL],
             ['ActivityListID', '!=', 5]
         ])->get();
     } else {
         $newLoans = Loans::where([
             ['APPLICATION_NO', NULL],
             ['OL_TEMP_APP_NO', '!=', NULL],
             ['ActivityListID', '!=', 5],
             ['BR_ID', $BR_ID]
         ])->get();
     }
 
     if ($newLoans->isEmpty()) {
         return response()->json(["message" => "There are no online new loan applications found."], 204);
     } else {
         return response()->json($newLoans, 200);
     }
 }

What am I missing here? They both use the same namespace. The codes work perfectly in my computer but when its on my hosting server (Amazon EC2) it returns an error 500. These are the headers from postman:

 Date
 Thu, 21 May 2020 08:16:22 GMT
 
 Server
 Apache/2.4.41 (Amazon) OpenSSL/1.0.2k-fips PHP/7.3.15
 
 X-Powered-By
 PHP/7.3.15
 
 Cache-Control
 no-cache, private
 
 Content-Length
 1750
 
 Connection
 close
 
 Content-Type
 text/html; charset=UTF-8