TYPO3 I got an error by list after the installation of my own plugin - typo3

Question

My TYPO3 version is 10.4.21 and I use extensions (Fluid styled content, sitepackage, Bootstrap, pizpalue and my own plugin which I made).
I created a plugin which names New Flipbox, because I have to make a new content element with a function of flipbox for my project work. But I have an error.
If I click a list button on the menu on the left side, an error occurred:
Oops, an error occurred! An exception occurred while executing 'SELECT
uid FROM tx_myextensionkey_domain_model_newflipbox WHERE
(tx_myextensionkey_domain_model_newflipbox.pid = ?) AND
((tx_myextensionkey_domain_model_newflipbox.deleted = 0) AND
((tx_myextensionkey_domain_model_newflipbox.t3ver_wsid = 0) AND
(tx_myextensionkey_domain_model_newflipbox.t3ver_oid = 0)))
LIMIT 1' with params [1]: SQLSTATE[42S02]: Base table or view not
found: 1146 Table
'd037b84f.tx_rsnmizukiflipbox_domain_model_newflipbox' doesn't exist
How can I fix it?
For now, I've written down these:
in /typo3conf/ext/myextension/Configuration/TCA/Overrides/tt_content.php:
\TYPO3\CMS\Core\Utility\ExtensionManagementUtility::addPlugin(
array(
'My Flipbox',
'rsnflipbox',
'EXT:core/Resources/Public/Icons/T3Icons/content/content-carousel-image.svg'
),
'CType',
'myextensionkey'
);
// Configure the default backend fields for the content element
$GLOBALS['TCA']['tt_content']['types']['flipbox_contentelement'] = [
'showitem' => '
--div--;LLL:EXT:core/Resources/Private/Language/Form/locallang_tabs.xlf:general,
--palette--;;general,
header; Internal title (not displayed),
bodytext;LLL:EXT:frontend/Resources/Private/Language/locallang_ttc.xlf:bodytext_formlabel,
--div--;LLL:EXT:core/Resources/Private/Language/Form/locallang_tabs.xlf:access,
--palette--;;hidden,
--palette--;;access,
',
'columnsOverrides' => [
'bodytext' => [
'config' => [
'enableRichtext' => true,
'richtextConfiguration' => 'default',
],
],
],
];
in /typo3conf/ext/myextension/ext_location.php
\TYPO3\CMS\Core\Utility\ExtensionManagementUtility::addPageTSConfig(
'mod {
wizards.newContentElement.wizardItems.plugins {
elements {
newflipbox {
iconIdentifier = content-dashboard
title = LLL:EXT:myextensionkey/Resources/Private/Language/locallang_db.xlf:tx_myextensionkey_newflipbox.name
description = LLL:EXT:myextensionkey/Resources/Private/Language/locallang_db.xlf:tx_myextensionkey_newflipbox.description
tt_content_defValues {
CType = list
list_type = key_newflipbox
}
}
}
show = *
}
}'
);
// wizards bei Plugin
\TYPO3\CMS\Core\Utility\ExtensionManagementUtility::addPageTSConfig(
'mod {
wizards.newContentElement.wizardItems.interactive {
elements {
newflipbox {
iconIdentifier = content-dashboard
title = LLL:EXT:myextensionkey/Resources/Private/Language/locallang_db.xlf:tx_myextensionkey_newflipbox.name
description = LLL:EXT:myextensionkey/Resources/Private/Language/locallang_db.xlf:tx_myextensionkey_newflipbox.description
tt_content_defValues {
CType = list
list_type = key_newflipbox
}
}
}
show = *
}
}'
);
$iconRegistry = \TYPO3\CMS\Core\Utility\GeneralUtility::makeInstance(\TYPO3\CMS\Core\Imaging\IconRegistry::class);
$iconRegistry->registerIcon(
'myextensionkey-plugin-newflipbox',
\TYPO3\CMS\Core\Imaging\IconProvider\SvgIconProvider::class,
['source' => 'EXT:myextensionkey/Resources/Public/Icons/user_plugin_newflipbox.svg']
);
});
in /typo3conf/ext/myextension/Configuration/TypoScript/setup.typoscript
lib.contentElement {
templateRootPaths.200 = EXT:myextensionkey/Resources/Private/Templates/
}
lib.contentElement {
partialRootPaths.200 = EXT:myextensionkey/Resources/Private/Partials/
}
lib.contentElement {
layoutRootPaths.200 = EXT:myextensionkey/Resources/Private/Layouts/
}
tt_content {
flipbox_contentelement =< lib.contentElement
flipbox_contentelement {
templateName = NewContentElement
}
}
I saw a website of TYPO3(https://docs.typo3.org/m/typo3/reference-coreapi/master/en-us/ApiOverview/ContentElements/AddingYourOwnContentElements.html) to create a element content, but I can't go on because of some errors.
What should I do now? I hope someone can help me.
Thank you.

Answer 1

The error message clearly states that the table tx_rsnmizukiflipbox_domain_model_newflipbox is missing. So you should check if you have added ext_tables.sql with the necessary database fields and then you should go to the install tool and do a database compare to create the missing table.