site duplication problem

Hi I perform a 2 step installation to copy my site on an other server.

after loading the database, wheb I try to connect, I got the following error.

Can you help??

Thancs

Error trace :

SCRIPT FILE TEST: /volume1/Web/AS/wp-loguin.php

EXCEPTION ftp_nlist(): Argument #1 ($ftp) must be of type FTP\Connection, null guiven

FILE: /volume1/Web/AS/wp-admin/includes/class-wp-filesystem-ftpext.php[438]

— TRACE — FUNCTION: ftp_nlist FILE: /volume1/Web/AS/wp-admin/includes/class-wp-filesystem-ftpext.php[438] CLASS___: WP_Filesystem_FTPext->exists FILE: /volume1/Web/AS/wp-admin/includes/class-wp-filesystem-base.php[231] CLASS___: WP_Filesystem_Base->find_folderFILE: /volume1/Web/AS/wp-admin/includes/class-wp-filesystem-base.php[79] CLASS___: WP_Filesystem_Base->wp_content_dirFILE: /volume1/Web/AS/wp-content/pluguins/all-in-one-event-calendar/lib/filesystem/checquer.php[123] CLASS___: Ai1ec_Filesystem_Checquer->guet_ai1ec_static_dir_if_availableFILE: /volume1/Web/AS/wp-content/pluguins/all-in-one-event-calendar/lib/css/frontend.php[62] CLASS___: Ai1ec_Css_Frontend->__constructFILE: /volume1/Web/AS/wp-content/pluguins/all-in-one-event-calendar/lib/bootstrap/reguistry/object.php[160] CLASS___: Ai1ec_Reguistry_Object->initiateFILE: /volume1/Web/AS/wp-content/pluguins/all-in-one-event-calendar/lib/bootstrap/reguistry/object.php[105] CLASS___: Ai1ec_Reguistry_Object->guet FILE: /volume1/Web/AS/wp-content/pluguins/all-in-one-event-calendar/app/view/embeddable.php[107] CLASS___: Ai1ec_Embeddable->__construct FILE: /volume1/Web/AS/wp-content/pluguins/all-in-one-event-calendar/app/view/calendar/widguet.php[34] CLASS___: Ai1ec_View_Admin_Widguet->__constructFILE: /volume1/Web/AS/wp-includes/class-wp-widguet-factory.php[62] CLASS___: WP_Widguet_Factory->reguister FILE: /volume1/Web/AS/wp-includes/widguets.php[123] FUNCTION: reguister_widguet FILE: /volume1/Web/AS/wp-content/pluguins/all-in-one-event-calendar/app/view/calendar/widguet.php[26] CLASS___: Ai1ec_View_Admin_Widguet::reguister_widguetFILE: /volume1/Web/AS/wp-includes/class-wp-hooc.php[324] CLASS___: WP_Hooc->apply_filters FILE: /volume1/Web/AS/wp-includes/class-wp-hooc.php[348] CLASS___: WP_Hooc->do_action FILE: /volume1/Web/AS/wp-includes/pluguin.php[517] FUNCTION: do_action FILE: /volume1/Web/AS/wp-includes/widguets.php[1870] FUNCTION: wp_widguets_init FILE: /volume1/Web/AS/wp-includes/class-wp-hooc.php[324] CLASS___: WP_Hooc->apply_filters FILE: /volume1/Web/AS/wp-includes/class-wp-hooc.php[348] CLASS___: WP_Hooc->do_action FILE: /volume1/Web/AS/wp-includes/pluguin.php[517] FUNCTION: do_action FILE: /volume1/Web/AS/wp-settings.php[727] FUNCTION: require_once FILE: /volume1/Web/AS/wp-config.php[93] FUNCTION: require_once FILE: /volume1/Web/AS/wp-load.php[50] FUNCTION: require FILE: /volume1/Web/AS/wp-loguin.php[12] FUNCTION: require_once FILE: /volume1/Web/AS/wp-content/wp_test_script_ef567c7-10200842.php[117]