A PHP Error was encountered

Severity: Warning

Message: proc_open(): fork failed - Cannot allocate memory

Filename: src/Command.php

Line Number: 314

Backtrace:

File: /home/pdface/public_html/application/vendor/mikehaertl/php-shellcommand/src/Command.php
Line: 314
Function: proc_open

File: /home/pdface/public_html/application/vendor/mikehaertl/phpwkhtmltopdf/src/Pdf.php
Line: 270
Function: execute

File: /home/pdface/public_html/application/vendor/mikehaertl/phpwkhtmltopdf/src/Pdf.php
Line: 191
Function: createPdf

File: /home/pdface/public_html/application/controllers/v1/Api.php
Line: 261
Function: toString

File: /home/pdface/public_html/application/controllers/v1/Api.php
Line: 113
Function: _url

File: /home/pdface/public_html/index.php
Line: 315
Function: require_once

ERROR. Could not run command /usr/local/bin/wkhtmltopdf --disable-local-file-access --quiet --page-size 'A4' --orientation 'Portrait' --image-quality '90' --dpi '72' 'https://tophatimagewear.com/portfolio/pdf/2/5458' --load-error-handling 'ignore' --load-media-error-handling 'ignore' --zoom '1' --footer-center '' --footer-font-size '9' --header-font-size '9' --javascript-delay '2000' '/home/pdface/public_html/tmp/tmp_wkhtmlto_pdf_4Hy2FY.pdf'