WHMCS 8.13.1 - import from Blesta 5.11.5

[leandrogbreve]

I've been struggling to import data from Blesta 5.11.5 to WHMCS 8.13.1 and it keeps getting stuck in "products & services" step.

It seemed that it forced WHMCS to call an outdated class/package, here is related log:

Class "Doctrine\DBAL\Driver\PDOMySql\Driver" not found in /home/xxx/public_html/vendor/illuminate/database/MySqlConnection.php:64 

Stack trace: 
#0 /home/xxx/public_html/vendor/illuminate/database/Connection.php(894): Illuminate\Database\MySqlConnection->getDoctrineDriver() 
#1 /home/xxx/public_html/modules/addons/import_assist/lib/ImportAssist/Source/Blesta5/Entity/Product.php(0): Illuminate\Database\Connection->getDoctrineSchemaManager()
(...)

=== update ===

I managed to make it work by creating DBAL package via composer locally on my machine and uploading to a folder 'vendor_dbal' inside import_assist/ and created a hook to tell WHMCS to load that folder as well.