[OJS 3.3.0.13] Errors after update

Hi @asmecher,

After upgrading to OJS version from 3.2.1.4 to 3.3.0.13, I have several errors that I would like to solve:

PHP Fatal error:  Uncaught InvalidArgumentException: Passed value cannot be an array in /lib/pkp/lib/vendor/danielstjules/stringy/src/Stringy.php:45
Stack trace:
#0 /lib/pkp/lib/vendor/danielstjules/stringy/src/Stringy.php(73): Stringy\\Stringy->__construct(Array, NULL)
#1 /lib/pkp/classes/core/PKPString.inc.php(160): Stringy\\Stringy::create(Array)
#2 cache/t_compile/636c2e7eaf78ae663eb6e72e7568dda0f88b6f93^c2055d14f27582f3361894f4184ce1a4c0497385_0.app.frontendpagessearchAuthor.php(58): PKPString::substr(Array, 0, 1)
#3 /lib/pkp/lib/vendor/smarty/smarty/libs/sysplugins/smarty_template_resource_base.php(123): content_63b2e2beee93d8_34743301(Object(Smarty_Internal_Template))
#4 /lib/pkp/lib/vendor/smarty/smarty/libs/sysplugins/smarty_template_compiled.php(114): Smarty_Template_Resource_Base->getRen in /lib/pkp/lib/vendor/danielstjules/stringy/src/Stringy.php on line 45
PHP Fatal error:  Uncaught TypeError: Argument 1 passed to DOMDocument::importNode() must be an instance of DOMNode, null given in /lib/pkp/plugins/importexport/native/filter/PKPPublicationNativeXmlFilter.inc.php:258\nStack trace:
#0 /lib/pkp/plugins/importexport/native/filter/PKPPublicationNativeXmlFilter.inc.php(258): DOMDocument->importNode(NULL, true)
#1 /lib/pkp/plugins/importexport/native/filter/PKPPublicationNativeXmlFilter.inc.php(98): PKPPublicationNativeXmlFilter->addRepresentations(Object(DOMDocument), Object(DOMElement), Object(Publication))
#2 /plugins/importexport/native/filter/PublicationNativeXmlFilter.inc.php(52): PKPPublicationNativeXmlFilter->createEntityNode(Object(DOMDocument), Object(Publication))
#3 /lib/pkp/plugins/importexport/native/filter/PKPPublicationNativeXmlFilter.inc.php(52): PublicationNativeXmlFilter->c in /lib/pkp/plugins/importexport/native/filter/PKPPublicationNativeXmlFilter.inc.php on line 258

PHP Fatal error:  Uncaught Error: Call to undefined method OrcidProfilePlugin::sendSubmissionToOrcid() in /plugins/generic/orcidProfile/pages/OrcidHandler.inc.php:294\nStack trace:
#0 /lib/pkp/classes/core/PKPRouter.inc.php(395): OrcidHandler->orcidVerify(Array, Object(Request))
#1 /lib/pkp/classes/core/PKPPageRouter.inc.php(246): PKPRouter->_authorizeInitializeAndCallRequest(Array, Object(Request), Array, false)
#2 /lib/pkp/classes/core/Dispatcher.inc.php(144): PKPPageRouter->route(Object(Request))
#3 /lib/pkp/classes/core/PKPApplication.inc.php(362): Dispatcher->dispatch(Object(Request))
#4 /index.php(68): PKPApplication->execute()
#5 {main}\n  thrown in /plugins/generic/orcidProfile/pages/OrcidHandler.inc.php on line 294, referer: https://orcid.org/

And apart from the errors, I also have several warnings, which I would like to know if they are cosmetic or should be reviewed:

PHP Notice:  Undefined offset: 7 in /lib/pkp/plugins/importexport/native/filter/SubmissionFileNativeXmlFilter.inc.php on line 85
PHP Notice:  Trying to get property 'documentElement' of non-object in /plugins/importexport/native/filter/IssueNativeXmlFilter.inc.php on line 204
PHP Warning:  Cannot modify header information - headers already sent by (output started at /lib/pkp/plugins/generic/acron/PKPAcronPlugin.inc.php:218) in /lib/pkp/classes/plugins/ImportExportPlugin.inc.php on line 178