Fatal error: Cannot access property started with '\'

Hello!

I tried to install my my duplicate but I got an error and I can’t go further.

Here is the error message I get:
[Thu Apr 16 14:15:47 2015] [hphp] [17875:7fa993bff700:183:000001] [] \nFatal error: Cannot access property started with '\' in /var/customers/webs/installer.php on line 939

I just clicked in the “Step 2: Files & Database” on the button “Run Update”. After a feq seconds I see this response on the website:

server code: 200
status: OK
response:

Here is the installer-log.txt for the 2nd step:

********************************************************************************
DUPLICATOR INSTALL-LOG
STEP2 START @ 02:12:37
NOTICE: Do not post to public sites or forums
********************************************************************************
CHARSET SERVER:	latin1
CHARSET CLIENT:	 utf8 

--------------------------------------
SERIALIZER ENGINE
[*] scan every column
[~] scan only text columns
[^] no searchable columns
--------------------------------------
wp_affiliate_wp_affiliates^ (0)
wp_affiliate_wp_creatives^ (0)
wp_affiliate_wp_referrals^ (0)
wp_affiliate_wp_visits^ (0)
wp_bp_activity~ (1)
wp_bp_activity_meta^ (0)
wp_bp_notifications^ (0)
wp_bp_xprofile_data~ (3)
wp_bp_xprofile_fields~ (1)
wp_bp_xprofile_groups~ (1)
wp_bp_xprofile_meta^ (0)
wp_commentmeta~ (174)
wp_comments~ (317)
wp_duplicator_packages^ (0)
wp_followup_coupon_logs^ (0)
wp_followup_coupons^ (0)
wp_followup_customer_orders^ (0)
wp_followup_customers^ (0)
wp_followup_email_coupons^ (0)
wp_followup_email_excludes^ (0)
wp_followup_email_logs^ (0)
wp_followup_email_order_coupons^ (0)
wp_followup_email_orders^ (0)
wp_followup_email_tracking^ (0)
wp_followup_order_categories^ (0)
wp_followup_order_items^ (0)
wp_groups_capability~ (252)
wp_groups_group~ (1)
wp_groups_group_capability^ (0)
wp_groups_user_capability^ (0)
wp_groups_user_group~ (3)
wp_layerslider^ (0)
wp_links^ (0)
wp_optimizepress_assets^ (0)
wp_optimizepress_launchfunnels^ (0)
wp_optimizepress_launchfunnels_pages^ (0)
wp_optimizepress_layout_categories~ (8)
wp_optimizepress_pb_products^ (0)
wp_optimizepress_post_layouts~ (2)
wp_optimizepress_predefined_layouts~ (41)
wp_optimizepress_presets^ (0)
wp_options~ (404)
wp_postmeta~ (22813)

On my server I use HHVM as fastcgi, maybe the Duplicator is not compatible with it? I hope taht somebody can help me!

Best regards from Germany

https://ww.wp.xz.cn/plugins/duplicator/