1

I am unable to find solution of below error. I have tried with disable some modules checked tab, sections in most of modules. kindly help me for this.

{"0":"Notice: Undefined index: id in \/var\/www\/html\/example.com\/vendor\/magento\/module-config\/Model\/Config\/Structure\/Element\/Iterator.php
 on line 63","1":"#0
 \/var\/www\/html\/example.com\/vendor\/magento\/module-config\/Model\/Config\/Structure\/Element\/Iterator.php(63):
 Magento\\Framework\\App\\ErrorHandler-    handler(8, 'Undefined
 index...', '\/var\/www\/html\/y...', 63, Array)\n#1
 \/var\/www\/html\/example.com\/vendor\/magento\/module-config\/Model\/Config\/Structure.php(146):
 Magento\\Config\\Model\\Config\\Structure\\Element\\Iterator-    setElements(Array,
 'default')\n#2
 \/var\/www\/html\/example.com\/vendor\/magento\/module-config\/Model\/Config\/Structure.php(209):
 Magento\\Config\\Model\\Config\\Structure-    getTabs()\n#3
 \/var\/www\/html\/example.com\/vendor\/magento\/module-config\/Controller\/Adminhtml\/System\/AbstractConfig.php(60):
 Magento\\Config\\Model\\Config\\Structure-    getFirstSection()\n#4
 \/var\/www\/html\/example.com\/vendor\/magento\/framework\/Interception\/Interceptor.php(58):
 Magento\\Config\\Controller\\Adminhtml\\System\\AbstractConfig-    dispatch(Object(Magento\\Framework\\App\\Request\\Http))\n#5
 \/var\/www\/html\/example.com\/vendor\/magento\/framework\/Interception\/Interceptor.php(138):
 Magento\\Config\\Controller\\Adminhtml\\System\\Config\\Index\\Interceptor-    ___callParent('dispatch',
 Array)\n#6
 \/var\/www\/html\/example.com\/vendor\/magento\/module-backend\/App\/Action\/Plugin\/Authentication.php(143):
 Magento\\Config\\Controller\\Adminhtml\\System\\Config\\Index\\Interceptor-    Magento\\Framework\\Interception\\{closure}(Object(Magento\\Framework\\App\\Request\\Http))\n#7
 \/var\/www\/html\/example.com\/vendor\/magento\/framework\/Interception\/Interceptor.php(135):
 Magento\\Backend\\App\\Action\\Plugin\\Authentication-    aroundDispatch(Object(Magento\\Config\\Controller\\Adminhtml\\System\\Config\\Index\\Interceptor),
 Object(Closure), Object(Magento\\Framework\\App\\Request\\Http))\n#8
 \/var\/www\/html\/example.com\/vendor\/magento\/framework\/Interception\/Interceptor.php(153):
 Magento\\Config\\Controller\\Adminhtml\\System\\Config\\Index\\Interceptor-    Magento\\Framework\\Interception\\{closure}(Object(Magento\\Framework\\App\\Request\\Http))\n#9
 \/var\/www\/html\/example.com\/generated\/code\/Magento\/Config\/Controller\/Adminhtml\/System\/Config\/Index\/Interceptor.php(26):
 Magento\\Config\\Controller\\Adminhtml\\System\\Config\\Index\\Interceptor-    ___callPlugins('dispatch',
 Array, NULL)\n#10
 \/var\/www\/html\/example.com\/vendor\/magento\/framework\/App\/FrontController.php(55):
 Magento\\Config\\Controller\\Adminhtml\\System\\Config\\Index\\Interceptor-    dispatch(Object(Magento\\Framework\\App\\Request\\Http))\n#11
 \/var\/www\/html\/example.com\/vendor\/magento\/framework\/Interception\/Interceptor.php(58):
 Magento\\Framework\\App\\FrontController-    dispatch(Object(Magento\\Framework\\App\\Request\\Http))\n#12
 \/var\/www\/html\/example.com\/vendor\/magento\/framework\/Interception\/Interceptor.php(138):
 Magento\\Framework\\App\\FrontController\\Interceptor-    ___callParent('dispatch',
 Array)\n#13
 \/var\/www\/html\/example.com\/vendor\/magento\/framework\/Interception\/Interceptor.php(153):
 Magento\\Framework\\App\\FrontController\\Interceptor-    Magento\\Framework\\Interception\\{closure}(Object(Magento\\Framework\\App\\Request\\Http))\n#14
 \/var\/www\/html\/example.com\/generated\/code\/Magento\/Framework\/App\/FrontController\/Interceptor.php(26):
 Magento\\Framework\\App\\FrontController\\Interceptor-    ___callPlugins('dispatch',
 Array, Array)\n#15
 \/var\/www\/html\/example.com\/vendor\/magento\/framework\/App\/Http.php(135):
 Magento\\Framework\\App\\FrontController\\Interceptor-    dispatch(Object(Magento\\Framework\\App\\Request\\Http))\n#16
 \/var\/www\/html\/example.com\/vendor\/magento\/framework\/App\/Bootstrap.php(257):
 Magento\\Framework\\App\\Http-    launch()\n#17
 \/var\/www\/html\/example.com\/pub\/index.php(55):
 Magento\\Framework\\App\\Bootstrap-    run(Object(Magento\\Framework\\App\\Http\\Interceptor))\n#18
 {main}","url":"\/admyokkao\/admin\/system_config\/","script_name":"\/index.php"}
3

Try disabling all the custom modules and check for the error. If the system doesn't throw any errors, then that means one of system.xml file in your custom modules is causing the issue.

Disable all your custom modules by executing the below command. Here replace VendorName with the one you are using.

php bin/magento module:status | grep [VendorName] | grep -v List | grep -v None | grep -v -e '^$' | xargs php bin/magento module:disable -f

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