Hi @yazeedkaraee27,
This issue appears due to 2 major reasons.
- The system.xml file has wrong tab ID.
- The tab ID referenced in the system.xml file is in some other module which is not present because it is part of another git branch or it is disabled.
To resolve this error, you can do the following in system.xml:
<tab id="tab_section" translate="label" sortOrder="20">
<label>Custom Tab</label>
</tab>
<section id="custom_section" translate="label" type="text" sortOrder="40" showInDefault="1" showInWebsite="1" showInStore="1">
<class>separator-top</class>
<label>Custom Section</label>
<tab>tabsection</tab>To fix the issue, you have to change
<tab>tabsection</tab>
to
<tab>tab_section</tab>
If issue still remains then you can debug the issue by do the following:
One easy way to debug is: browse and open vendor/magento/module-config/Model/Config/Structure/Element/Iterator.php
Change:
public function setElements(array $elements, $scope)
{
$this->_elements = $elements;
$this->_scope = $scope;
if (count($elements)) {
$lastElement = end($elements);
$this->_lastId = $lastElement['id'];
}
}
To:
public function setElements(array $elements, $scope)
{
$writer = new \Zend\Log\Writer\Stream(BP . '/var/log/config_debug.log');
$logger = new \Zend\Log\Logger();
$logger->addWriter($writer);
$this->_elements = $elements;
$this->_scope = $scope;
if (count($elements)) {
$lastElement = end($elements);
// Log last Element
$logger->info($lastElement);
$this->_lastId = $lastElement['id'];
}
}Reload browser configuration window and see once again the error.
Check var/log/config_debug.log file.
Go to very bottom of the file and see which module failed, where it stopped.
That's the one causing your issues.
Don't forget to rollback your changes once fixed.
