Hi, I wanted to test abandoned cart lite before I purchase the full version. After activation, I'm getting this error message:

Warning: sessionstart(): open(/var/www/tmp/sess59efcc0b82dc50c12692c1973da74e8e, ORDWR) failed: No such file or directory (2) in /home/unlhapftp/publichtml/access/wp-content/plugins/woocommerce-abandoned-cart/woocommerce-ac.php on line 1913

Warning: sessionstart(): Failed to read session data: files (path: /var/www/tmp) in /home/unlhapftp/publichtml/access/wp-content/plugins/woocommerce-abandoned-cart/woocommerce-ac.php on line 1913

Any idea where this might come from?

Thx
Rob