Error.log contains all PHP messages generated while exporting or importing. This includes notices that do not stop running processes.
It is located in the directory ‘/wordpress/wp-content/plugins/all-in-one-wp-migration/storage/’. The errors and messages in the file are related to any problems that the plugin may encounter during the migration. This includes incorrectly set file/folder permissions on the server, conflicting plugins and/or themes, conflicts with the PHP version installed on the server, and so on.
If the export or import goes smoothly, the error.log file will not be in the “storage” directory. This indicates that All-in-One WP Migration did not encounter any problems. If you encounter any problems while migrating your website, you can use the error.log information to try to find the problem or, at the very least, to determine whether the problem is related to the migration plugin.