Magento\Framework\Exception\LocalizedException: The XML in file "/home/lastenshule/public_html/test.nordisk-handelshus.dk/vendor/epay/magento2-payment-module/etc/events.xml" is invalid:
Element 'observer', attribute 'method': The attribute 'method' is not allowed.
Line: 19

Element 'observer', attribute 'method': The attribute 'method' is not allowed.
Line: 22

Verify the XML and try again. in /home/lastenshule/public_html/test.nordisk-handelshus.dk/vendor/magento/framework/Config/Reader/Filesystem.php:156
Stack trace:
#0 /home/lastenshule/public_html/test.nordisk-handelshus.dk/vendor/magento/framework/Config/Reader/Filesystem.php(132): Magento\Framework\Config\Reader\Filesystem->_readFiles(Object(Magento\Framework\Config\FileIterator))
#1 /home/lastenshule/public_html/test.nordisk-handelshus.dk/generated/code/Magento/Framework/Event/Config/Reader/Proxy.php(95): Magento\Framework\Config\Reader\Filesystem->read('global')
#2 /home/lastenshule/public_html/test.nordisk-handelshus.dk/vendor/magento/framework/Config/Data/Scoped.php(119): Magento\Framework\Event\Config\Reader\Proxy->read('global')
#3 /home/lastenshule/public_html/test.nordisk-handelshus.dk/vendor/magento/framework/Config/Data/Scoped.php(97): Magento\Framework\Config\Data\Scoped->_loadScopedData()
#4 /home/lastenshule/public_html/test.nordisk-handelshus.dk/vendor/magento/framework/Event/Config.php(37): Magento\Framework\Config\Data\Scoped->get('core_collection...', Array)
#5 /home/lastenshule/public_html/test.nordisk-handelshus.dk/vendor/magento/framework/Event/Manager.php(58): Magento\Framework\Event\Config->getObservers('core_collection...')
#6 /home/lastenshule/public_html/test.nordisk-handelshus.dk/generated/code/Magento/Framework/Event/Manager/Proxy.php(95): Magento\Framework\Event\Manager->dispatch('core_collection...', Array)
#7 /home/lastenshule/public_html/test.nordisk-handelshus.dk/vendor/magento/framework/Model/ResourceModel/Db/Collection/AbstractCollection.php(541): Magento\Framework\Event\Manager\Proxy->dispatch('core_collection...', Array)
#8 /home/lastenshule/public_html/test.nordisk-handelshus.dk/vendor/magento/framework/Data/Collection/AbstractDb.php(577): Magento\Framework\Model\ResourceModel\Db\Collection\AbstractCollection->_beforeLoad()
#9 /home/lastenshule/public_html/test.nordisk-handelshus.dk/generated/code/Magento/Config/Model/ResourceModel/Config/Data/Collection/Interceptor.php(329): Magento\Framework\Data\Collection\AbstractDb->loadWithFilter(false, false)
#10 /home/lastenshule/public_html/test.nordisk-handelshus.dk/vendor/magento/framework/Data/Collection/AbstractDb.php(565): Magento\Config\Model\ResourceModel\Config\Data\Collection\Interceptor->loadWithFilter(false, false)
#11 /home/lastenshule/public_html/test.nordisk-handelshus.dk/generated/code/Magento/Config/Model/ResourceModel/Config/Data/Collection/Interceptor.php(320): Magento\Framework\Data\Collection\AbstractDb->load(false, false)
#12 /home/lastenshule/public_html/test.nordisk-handelshus.dk/vendor/magento/module-config/App/Config/Source/RuntimeConfigSource.php(89): Magento\Config\Model\ResourceModel\Config\Data\Collection\Interceptor->load()
#13 /home/lastenshule/public_html/test.nordisk-handelshus.dk/vendor/magento/module-config/App/Config/Source/RuntimeConfigSource.php(72): Magento\Config\App\Config\Source\RuntimeConfigSource->loadConfig()
#14 /home/lastenshule/public_html/test.nordisk-handelshus.dk/vendor/magento/framework/App/Config/ConfigSourceAggregated.php(42): Magento\Config\App\Config\Source\RuntimeConfigSource->get('')
#15 /home/lastenshule/public_html/test.nordisk-handelshus.dk/vendor/magento/module-config/App/Config/Type/System/Reader.php(60): Magento\Framework\App\Config\ConfigSourceAggregated->get()
#16 /home/lastenshule/public_html/test.nordisk-handelshus.dk/generated/code/Magento/Config/App/Config/Type/System/Reader/Proxy.php(95): Magento\Config\App\Config\Type\System\Reader->read()
#17 /home/lastenshule/public_html/test.nordisk-handelshus.dk/vendor/magento/module-config/App/Config/Type/System.php(395): Magento\Config\App\Config\Type\System\Reader\Proxy->read()
#18 /home/lastenshule/public_html/test.nordisk-handelshus.dk/vendor/magento/framework/Cache/LockGuardedCacheLoader.php(136): Magento\Config\App\Config\Type\System->readData()
#19 /home/lastenshule/public_html/test.nordisk-handelshus.dk/vendor/magento/module-config/App/Config/Type/System.php(281): Magento\Framework\Cache\LockGuardedCacheLoader->lockedLoadData('SYSTEM_CONFIG', Object(Closure), Object(Closure), Object(Closure))
#20 /home/lastenshule/public_html/test.nordisk-handelshus.dk/vendor/magento/module-config/App/Config/Type/System.php(207): Magento\Config\App\Config\Type\System->loadDefaultScopeData('default')
#21 /home/lastenshule/public_html/test.nordisk-handelshus.dk/vendor/magento/module-config/App/Config/Type/System.php(181): Magento\Config\App\Config\Type\System->getWithParts('default/newreli...')
#22 /home/lastenshule/public_html/test.nordisk-handelshus.dk/vendor/magento/framework/App/Config.php(132): Magento\Config\App\Config\Type\System->get('default/newreli...')
#23 /home/lastenshule/public_html/test.nordisk-handelshus.dk/vendor/magento/framework/App/Config.php(80): Magento\Framework\App\Config->get('system', 'default/newreli...')
#24 /home/lastenshule/public_html/test.nordisk-handelshus.dk/vendor/magento/framework/App/Config.php(93): Magento\Framework\App\Config->getValue('newrelicreporti...', 'default', NULL)
#25 /home/lastenshule/public_html/test.nordisk-handelshus.dk/vendor/magento/module-new-relic-reporting/Model/Config.php(94): Magento\Framework\App\Config->isSetFlag('newrelicreporti...')
#26 /home/lastenshule/public_html/test.nordisk-handelshus.dk/vendor/magento/module-new-relic-reporting/Plugin/HttpPlugin.php(49): Magento\NewRelicReporting\Model\Config->isNewRelicEnabled()
#27 /home/lastenshule/public_html/test.nordisk-handelshus.dk/vendor/magento/framework/Interception/Interceptor.php(121): Magento\NewRelicReporting\Plugin\HttpPlugin->beforeCatchException(Object(Magento\Framework\App\Http\Interceptor), Object(Magento\Framework\App\Bootstrap), Object(Magento\Framework\Exception\LocalizedException))
#28 /home/lastenshule/public_html/test.nordisk-handelshus.dk/vendor/magento/framework/Interception/Interceptor.php(153): Magento\Framework\App\Http\Interceptor->Magento\Framework\Interception\{closure}(Object(Magento\Framework\App\Bootstrap), Object(Magento\Framework\Exception\LocalizedException))
#29 /home/lastenshule/public_html/test.nordisk-handelshus.dk/generated/code/Magento/Framework/App/Http/Interceptor.php(32): Magento\Framework\App\Http\Interceptor->___callPlugins('catchException', Array, Array)
#30 /home/lastenshule/public_html/test.nordisk-handelshus.dk/vendor/magento/framework/App/Bootstrap.php(269): Magento\Framework\App\Http\Interceptor->catchException(Object(Magento\Framework\App\Bootstrap), Object(Magento\Framework\Exception\LocalizedException))
#31 /home/lastenshule/public_html/test.nordisk-handelshus.dk/pub/index.php(29): Magento\Framework\App\Bootstrap->run(Object(Magento\Framework\App\Http\Interceptor))
#32 {main}