Ojs 3.1.2.1 Native Import Export Plugin fail on some issue, produce blank page

  • Application Version - ojs 3.1.2.1

when i click export. it produce blank page… only 3 issue fail… most is ok and can be export

mod_fcgid: stderr: PHP Fatal error: Uncaught TypeError: Argument 1 passed to DOMDocument::importNode() must be an instance of DOMNode, null given in /home/publisher/public_html/ojs/lib/pkp/plugins/importexport/native/filter/SubmissionNativeXmlFilter.inc.php:259, referer: https://xxx/ojs/index.php/xxx//management/importexport/plugin/NativeImportExportPlugin
mod_fcgid: stderr: Stack trace:, referer: https://xxx//ojs/index.php/xxx//management/importexport/plugin/NativeImportExportPlugin
mod_fcgid: stderr: #0 /home/publisher/public_html/ojs/lib/pkp/plugins/importexport/native/filter/SubmissionNativeXmlFilter.inc.php(259): DOMDocument->importNode(NULL, true), referer: https://xxx//ojs/index.php/xxx//management/importexport/plugin/NativeImportExportPlugin
mod_fcgid: stderr: #1 /home/publisher/public_html/ojs/lib/pkp/plugins/importexport/native/filter/SubmissionNativeXmlFilter.inc.php(108): SubmissionNativeXmlFilter->addRepresentations(Object(DOMDocument), Object(DOMElement), Object(PublishedArticle)), referer: https://xxx//ojs/index.php/xxx//management/importexport/plugin/NativeImportExportPlugin
mod_fcgid: stderr: #2 /home/publisher/public_html/ojs/plugins/importexport/native/filter/ArticleNativeXmlFilter.inc.php(61): SubmissionNativeXmlFilter->createSubmissionNode(Object(DOMDocument), Object(PublishedArticle)), referer: https://xxx//ojs/index.php/xxx//management/importexport/plugin/NativeImportExportPlugin
mod_fcgid: stderr: #3 /home/publisher/public_html/ojs/lib/pkp/plugins/importexport/native/filter/SubmissionNativeXmlFilter.inc.php(65): ArticleNativeXmlFilter->createSubmissionNode(Object(DOMDocument), Object(Published in /home/publisher/public_html/ojs/lib/pkp/plugins/importexport/native/filter/SubmissionNativeXmlFilter.inc.php on line 259, referer: https://xxx//ojs/index.php/xxx//management/importexport/plugin/NativeImportExportPlugin

can guide me how to fix this. tqvm for the help.

solve this issue by unpublish and publish back the problem issue. tqvm

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