Article landing page in preview not showing

Software Support
1

Hi all,

when I preview an issues table of content and click an article title the article landing page is not shown, just an empty (white) page. Article PDF, HTML etc. do work however. I am using OJS 3.1.0.0. Any idea why the landing page is not generated?

Best
Armin

2

Hi @aguen

Could you take a look in your server PHP error log file, if there are any errors, when you open the article page?

Best,
Bozana

3

Hi Bozana,

Thank you for pointing to the error log. The problem seems to be the Citation Style Language plugin, probably in combination with PHP 5.5. The crucial error log is:

PHP Fatal error: Arrays are not allowed in class constants in <...>/plugins/generic/citationStyleLanguage/lib/vendor/seboettg/citeproc-php/src/Seboettg/CiteProc/Util/StringHelper.php on line 27, referer: https://<...>/index.php/<...>/issue/view/1

When I deactivate the Citation Style Language plugin the landing page is displayed as expected.

I found some discussions around this issue, especially this one:
https://forum.pkp.sfu.ca/t/ojs-3-1-0-issue-with-citation-style-language-plugin

The advices was to update to PHP 5.6 (we actually have PHP 5.5.9 running).

@Bozana: Do you know if upgrading to PHP 5.6 actually solves this issue?

Thanks,
Armin

4

Hi @aguen

OJS 3 system requirement is the PHP 5.6 or later, s. System Requirements here https://pkp.sfu.ca/ojs/ojs_download/.

I have locally PHP 5.6.33 and it works for me…

Best,
Bozana