My template installation ruining admin login page

My zencart installation giving me error upon attempting to admin login page and can't view login page. I've errors on log file as below:

Request URI: /admin5555/login.php?camefrom=index.php, 

#1  trigger_error() called at [/public_html/includes/classes/db/mysql/query_factory.php:171]
#2  queryFactory->show_error() called at [/public_html/includes/classes/db/mysql/query_factory.php:143]
#3  queryFactory->set_error() called at [/public_html/includes/classes/db/mysql/query_factory.php:270]

#4  queryFactory->Execute() called at [/public_html/admin5555/includes/installers/zen_lightbox/1_7_0.php:295]
#5  include(/public_html/admin5555/includes/installers/zen_lightbox/1_7_0.php) called at [/public_html/admin5555/includes/init_includes/init_zen_lightbox.php:47]
#6  require(/public_html/admin5555/includes/init_includes/init_zen_lightbox.php) called at [/public_html/includes/autoload_func.php:48]
#7  require(/public_html/includes/autoload_func.php) called at [/public_html/admin5555/includes/application_top.php:171]

#8  require(/public_html/admin5555/includes/application_top.php) called at [/public_html/admin5555/login.php:9]

--> PHP Fatal error: 1292:Incorrect datetime value: 'now()' for column 'last_modified' at row 1 :: INSERT INTO configuration SET  configuration_key="ZEN_LIGHTBOX_STATUS", configuration_title="<b>Zen Lightbox</b>", configuration_value="true", configuration_description="<br />If true, all product images on the following pages will be displayed within a lightbox:<br /><br />- document_general_info<br />- document_product_info<br />- page (EZ-Pages)<br />- product_free_shipping_info<br />- product_info<br />- product_music_info<br />- product_reviews<br />- product_reviews_info<br />- product_reviews_write<br /><br /><b>Default: true</b>", sort_order="100", use_function="null", set_function="zen_cfg_select_option(array(\'true\', \'false\'), ", last_modified="now()", date_added="now()", configuration_group_id="40" ==> (as called by) /public_html/admin5555/includes/installers/zen_lightbox/1_7_0.php on line 295 <== in /public_html/includes/classes/db/mysql/query_factory.php on line 171.```

Is there a way to get login page running??