A PHP Error was encountered

Severity: Warning

Message: file_get_contents(https://doi.crossref.org/servlet/getForwardLinks?usr=oepu&pwd=oepu_t4f8&doi=10.37349/etat.2023.00189 &startDate=2018-01-01&include_postedcontent=true): failed to open stream: HTTP request failed! HTTP/1.1 400 Bad request

Filename: controllers/Journals.php

Line Number: 1063

Backtrace:

File: /www/wwwroot/www.explorationpub.com/application/controllers/Journals.php
Line: 1063
Function: file_get_contents

File: /www/wwwroot/www.explorationpub.com/index.php
Line: 639
Function: require_once