Trying to import with native import plugin, getting blank pages, error messages show up in log

Version 3.3.0.8

[27-Aug-2024 10:57:29 America/New_York] PHP Fatal error: Uncaught Error: Call to a member function getData() on null in /var/www/html/ojs3/classes/search/ArticleSearchIndex.inc.php:38
Stack trace:
#0 /var/www/html/ojs3/plugins/importexport/native/filter/NativeXmlArticleFilter.inc.php(61): ArticleSearchIndex->submissionMetadataChanged()
#1 /var/www/html/ojs3/lib/pkp/classes/filter/Filter.inc.php(449): NativeXmlArticleFilter->process()
#2 /var/www/html/ojs3/plugins/importexport/native/NativeImportExportPlugin.inc.php(313): Filter->execute()
#3 /var/www/html/ojs3/plugins/importexport/native/NativeImportExportPlugin.inc.php(148): NativeImportExportPlugin->importSubmissions()
#4 /var/www/html/ojs3/lib/pkp/pages/management/PKPToolsHandler.inc.php(94): NativeImportExportPlugin->display()
#5 /var/www/html/ojs3/lib/pkp/classes/core/PKPRouter.inc.php(397): PKPToolsHandler->importexport()
#6 /var/www/html/ojs3/lib/pkp/classes/core/PKPPageRouter.inc.php(246): PKPRouter->_authorizeInitializeAndCallRequest()
#7 /var/www/html/ojs3/lib/pkp/classes/core/Dispatcher.inc.php(144): PKPPageRouter->route()
#8 /var/www/html/ojs3/lib/pkp/classes/core/PKPApplication.inc.php(360): Dispatcher->dispatch()
#9 /var/www/html/ojs3/index.php(68): PKPApplication->execute()
#10 {main}
thrown in /var/www/html/ojs3/classes/search/ArticleSearchIndex.inc.php on line 38

[27-Aug-2024 13:24:03 America/New_York] PHP Fatal error: Uncaught Exception: Submission file added to review round that does not exist. in /var/www/html/ojs3/lib/pkp/classes/services/PKPSubmissionFileService.inc.php:348
Stack trace:
#0 /var/www/html/ojs3/lib/pkp/plugins/importexport/native/filter/NativeXmlSubmissionFileFilter.inc.php(217): PKP\Services\PKPSubmissionFileService->add()
#1 /var/www/html/ojs3/lib/pkp/plugins/importexport/native/filter/NativeImportFilter.inc.php(60): NativeXmlSubmissionFileFilter->handleElement()
#2 /var/www/html/ojs3/lib/pkp/classes/filter/Filter.inc.php(449): NativeImportFilter->process()
#3 /var/www/html/ojs3/lib/pkp/plugins/importexport/native/filter/NativeXmlSubmissionFilter.inc.php(170): Filter->execute()
#4 /var/www/html/ojs3/lib/pkp/plugins/importexport/native/filter/NativeXmlSubmissionFilter.inc.php(128): NativeXmlSubmissionFilter->parseSubmissionFile()
#5 /var/www/html/ojs3/lib/pkp/plugins/importexport/native/filter/NativeXmlSubmissionFilter.inc.php(91): NativeXmlSubmissionFilter->handleChildElement()
#6 /var/www/html/ojs3/lib/pkp/plugins/importexport/native/filter/NativeImportFilter.inc.php(60): NativeXmlSubmissionFilter->handleElement()
#7 /var/www/html/ojs3/plugins/importexport/native/filter/NativeXmlArticleFilter.inc.php(52): NativeImportFilter->process()
#8 /var/www/html/ojs3/lib/pkp/classes/filter/Filter.inc.php(449): NativeXmlArticleFilter->process()
#9 /var/www/html/ojs3/plugins/importexport/native/NativeImportExportPlugin.inc.php(313): Filter->execute()
#10 /var/www/html/ojs3/plugins/importexport/native/NativeImportExportPlugin.inc.php(148): NativeImportExportPlugin->importSubmissions()
#11 /var/www/html/ojs3/lib/pkp/pages/management/PKPToolsHandler.inc.php(94): NativeImportExportPlugin->display()
#12 /var/www/html/ojs3/lib/pkp/classes/core/PKPRouter.inc.php(397): PKPToolsHandler->importexport()
#13 /var/www/html/ojs3/lib/pkp/classes/core/PKPPageRouter.inc.php(246): PKPRouter->_authorizeInitializeAndCallRequest()
#14 /var/www/html/ojs3/lib/pkp/classes/core/Dispatcher.inc.php(144): PKPPageRouter->route()
#15 /var/www/html/ojs3/lib/pkp/classes/core/PKPApplication.inc.php(360): Dispatcher->dispatch()
#16 /var/www/html/ojs3/index.php(68): PKPApplication->execute()
#17 {main}
thrown in /var/www/html/ojs3/lib/pkp/classes/services/PKPSubmissionFileService.inc.php on line 348

What did you try to import?

An XML file. I don’t know how to share it here, though.
It was an export from an instance running 3.3.0.8 and it was done through the native XML plugin.

All fine regarding the XML (I assume XML schema of origin and target are the same, both OJS 3.3.0-8). Did you import via GUI?

Yeah. I did it via GUI.