Magento 2.2.6 - Custom modue setup version for module is not specified

Question

I try with this but my local system is working fine but the same module when I upgrade in live site then is not working it gives the exception please let me know what I have to do?

Please see below error which I face,

Answer 1

Change module file/folder permission

Wrong file/folder permission may cause this error, you should try to set proper permission first, run this command in Magento 2 CLI

chmod 775 /magento/app/code/vendorname/modulename -R

Remove module from app/etc/config.php
If you see the error after removing a module of Magento, then try to remove the module in config.php file located in app/etc/config.php, for example:

return array (
 'modules' =>
  array (
    'Magento_Core' => 1,
    'Magento_Store' => 1,
    'Magento_Theme' => 1,
    'Magento_Authorization' => 1,
    'Magento_custommodule' => 1,
...
  ),
);

Remove the unwanted module (for example: Magento_custommodule ) and save the file. Finally clear cache to see if the error is gone.

Reference