I solved the blank email issues with this simple script.
Add other languages if necessary
#!/bin/sh
######## exec in /patchOJS/lib/pkp/tools
echo “corrigindo emails, favor aguarde…”
php installEmailTemplate.php ANNOUNCEMENT es_ES, en_US, fr_CA, fr_FR, it_IT, pt_BR, ru_RU
php installEmailTemplate.php CITATION_EDITOR_AUTHOR_QUERY es_ES, en_US, fr_CA, fr_FR, it_IT, pt_BR, ru_RU
php installEmailTemplate.php COPYEDIT_REQUEST es_ES, en_US, fr_CA, fr_FR, it_IT, pt_BR, ru_RU
php installEmailTemplate.php EDITOR_ASSIGN es_ES, en_US, fr_CA, fr_FR, it_IT, pt_BR, ru_RU
php installEmailTemplate.php EDITOR_DECISION_ACCEPT es_ES, en_US, fr_CA, fr_FR, it_IT, pt_BR, ru_RU
php installEmailTemplate.php EDITOR_DECISION_DECLINE es_ES, en_US, fr_CA, fr_FR, it_IT, pt_BR, ru_RU
php installEmailTemplate.php EDITOR_DECISION_RESUBMIT es_ES, en_US, fr_CA, fr_FR, it_IT, pt_BR, ru_RU
php installEmailTemplate.php EDITOR_DECISION_REVISIONS es_ES, en_US, fr_CA, fr_FR, it_IT, pt_BR, ru_RU
php installEmailTemplate.php EDITOR_DECISION_SEND_TO_EXTERNAL es_ES, en_US, fr_CA, fr_FR, it_IT, pt_BR, ru_RU
php installEmailTemplate.php EDITOR_DECISION_SEND_TO_PRODUCTION es_ES, en_US, fr_CA, fr_FR, it_IT, pt_BR, ru_RU
php installEmailTemplate.php EDITOR_RECOMMENDATION es_ES, en_US, fr_CA, fr_FR, it_IT, pt_BR, ru_RU
php installEmailTemplate.php EMAIL_LINK es_ES, en_US, fr_CA, fr_FR, it_IT, pt_BR, ru_RU
php installEmailTemplate.php LAYOUT_COMPLETE es_ES, en_US, fr_CA, fr_FR, it_IT, pt_BR, ru_RU
php installEmailTemplate.php LAYOUT_REQUEST es_ES, en_US, fr_CA, fr_FR, it_IT, pt_BR, ru_RU
php installEmailTemplate.php LOCKSS_EXISTING_ARCHIVE es_ES, en_US, fr_CA, fr_FR, it_IT, pt_BR, ru_RU
php installEmailTemplate.php LOCKSS_NEW_ARCHIVE es_ES, en_US, fr_CA, fr_FR, it_IT, pt_BR, ru_RU
php installEmailTemplate.php MANUAL_PAYMENT_NOTIFICATION es_ES, en_US, fr_CA, fr_FR, it_IT, pt_BR, ru_RU
php installEmailTemplate.php NOTIFICATION es_ES, en_US, fr_CA, fr_FR, it_IT, pt_BR, ru_RU
php installEmailTemplate.php NOTIFICATION_CENTER_DEFAULT es_ES, en_US, fr_CA, fr_FR, it_IT, pt_BR, ru_RU
php installEmailTemplate.php OPEN_ACCESS_NOTIFY es_ES, en_US, fr_CA, fr_FR, it_IT, pt_BR, ru_RU
php installEmailTemplate.php ORCID_COLLECT_AUTHOR_ID es_ES, en_US, fr_CA, fr_FR, it_IT, pt_BR, ru_RU
php installEmailTemplate.php ORCID_REQUEST_AUTHOR_AUTHORIZATION es_ES, en_US, fr_CA, fr_FR, it_IT, pt_BR, ru_RU
php installEmailTemplate.php PASSWORD_RESET es_ES, en_US, fr_CA, fr_FR, it_IT, pt_BR, ru_RU
php installEmailTemplate.php PASSWORD_RESET_CONFIRM es_ES, en_US, fr_CA, fr_FR, it_IT, pt_BR, ru_RU
php installEmailTemplate.php PAYPAL_INVESTIGATE_PAYMENT es_ES, en_US, fr_CA, fr_FR, it_IT, pt_BR, ru_RU
php installEmailTemplate.php PUBLISH_NOTIFY es_ES, en_US, fr_CA, fr_FR, it_IT, pt_BR, ru_RU
php installEmailTemplate.php REVIEWER_REGISTER es_ES, en_US, fr_CA, fr_FR, it_IT, pt_BR, ru_RU
php installEmailTemplate.php REVIEW_ACK es_ES, en_US, fr_CA, fr_FR, it_IT, pt_BR, ru_RU
php installEmailTemplate.php REVIEW_CANCEL es_ES, en_US, fr_CA, fr_FR, it_IT, pt_BR, ru_RU
php installEmailTemplate.php REVIEW_CONFIRM es_ES, en_US, fr_CA, fr_FR, it_IT, pt_BR, ru_RU
php installEmailTemplate.php REVIEW_DECLINE es_ES, en_US, fr_CA, fr_FR, it_IT, pt_BR, ru_RU
php installEmailTemplate.php REVIEW_REINSTATE es_ES, en_US, fr_CA, fr_FR, it_IT, pt_BR, ru_RU
php installEmailTemplate.php REVIEW_REMIND es_ES, en_US, fr_CA, fr_FR, it_IT, pt_BR, ru_RU
php installEmailTemplate.php REVIEW_REMIND_AUTO es_ES, en_US, fr_CA, fr_FR, it_IT, pt_BR, ru_RU
php installEmailTemplate.php REVIEW_REMIND_AUTO_ONECLICK es_ES, en_US, fr_CA, fr_FR, it_IT, pt_BR, ru_RU
php installEmailTemplate.php REVIEW_REMIND_ONECLICK es_ES, en_US, fr_CA, fr_FR, it_IT, pt_BR, ru_RU
php installEmailTemplate.php REVIEW_REQUEST es_ES, en_US, fr_CA, fr_FR, it_IT, pt_BR, ru_RU
php installEmailTemplate.php REVIEW_REQUEST_ATTACHED es_ES, en_US, fr_CA, fr_FR, it_IT, pt_BR, ru_RU
php installEmailTemplate.php REVIEW_REQUEST_ATTACHED_SUBSEQUENT es_ES, en_US, fr_CA, fr_FR, it_IT, pt_BR, ru_RU
php installEmailTemplate.php REVIEW_REQUEST_ONECLICK es_ES, en_US, fr_CA, fr_FR, it_IT, pt_BR, ru_RU
php installEmailTemplate.php REVIEW_REQUEST_ONECLICK_SUBSEQUENT es_ES, en_US, fr_CA, fr_FR, it_IT, pt_BR, ru_RU
php installEmailTemplate.php REVIEW_REQUEST_REMIND_AUTO es_ES, en_US, fr_CA, fr_FR, it_IT, pt_BR, ru_RU
php installEmailTemplate.php REVIEW_REQUEST_REMIND_AUTO_ONECLICK es_ES, en_US, fr_CA, fr_FR, it_IT, pt_BR, ru_RU
php installEmailTemplate.php REVIEW_REQUEST_SUBSEQUENT es_ES, en_US, fr_CA, fr_FR, it_IT, pt_BR, ru_RU
php installEmailTemplate.php REVISED_VERSION_NOTIFY es_ES, en_US, fr_CA, fr_FR, it_IT, pt_BR, ru_RU
php installEmailTemplate.php STATISTICS_REPORT_NOTIFICATION es_ES, en_US, fr_CA, fr_FR, it_IT, pt_BR, ru_RU
php installEmailTemplate.php SUBMISSION_ACK es_ES, en_US, fr_CA, fr_FR, it_IT, pt_BR, ru_RU
php installEmailTemplate.php SUBMISSION_ACK_NOT_USER es_ES, en_US, fr_CA, fr_FR, it_IT, pt_BR, ru_RU
php installEmailTemplate.php SUBSCRIPTION_AFTER_EXPIRY es_ES, en_US, fr_CA, fr_FR, it_IT, pt_BR, ru_RU
php installEmailTemplate.php SUBSCRIPTION_AFTER_EXPIRY_LAST es_ES, en_US, fr_CA, fr_FR, it_IT, pt_BR, ru_RU
php installEmailTemplate.php SUBSCRIPTION_BEFORE_EXPIRY es_ES, en_US, fr_CA, fr_FR, it_IT, pt_BR, ru_RU
php installEmailTemplate.php SUBSCRIPTION_NOTIFY es_ES, en_US, fr_CA, fr_FR, it_IT, pt_BR, ru_RU
php installEmailTemplate.php SUBSCRIPTION_PURCHASE_INDL es_ES, en_US, fr_CA, fr_FR, it_IT, pt_BR, ru_RU
php installEmailTemplate.php SUBSCRIPTION_PURCHASE_INSTL es_ES, en_US, fr_CA, fr_FR, it_IT, pt_BR, ru_RU
php installEmailTemplate.php SUBSCRIPTION_RENEW_INDL es_ES, en_US, fr_CA, fr_FR, it_IT, pt_BR, ru_RU
php installEmailTemplate.php SUBSCRIPTION_RENEW_INSTL es_ES, en_US, fr_CA, fr_FR, it_IT, pt_BR, ru_RU
php installEmailTemplate.php USER_REGISTER es_ES, en_US, fr_CA, fr_FR, it_IT, pt_BR, ru_RU
php installEmailTemplate.php USER_VALIDATE es_ES, en_US, fr_CA, fr_FR, it_IT, pt_BR, ru_RU
echo “emails inseridos com sucesso!”