Fatal Error after update to 2.6 theme version

[joseaguerreroParticipant]

Hello, I just updated to 2.6 theme version and start to have problems.
I can’t save posts or pages, got always some fatal error.
It comes from 7up-core plugin. I change the old plugin for plugin inside 2.6 version, trying to fix the problem, but didn’t fix error…

This is one fatal error from a recent page saving:

Fatal error: Uncaught TypeError: in_array(): Argument #2 ($haystack) must be of type array, null given in /homepages/46/d385559705/htdocs/wp-content/plugins/7up-core/libs/includes/admin/responsive_build.php:58 Stack trace: #0 /homepages/46/d385559705/htdocs/wp-content/plugins/7up-core/libs/includes/admin/responsive_build.php(58): in_array(‘vc_row’, NULL) #1 /homepages/46/d385559705/htdocs/wp-content/plugins/7up-core/libs/includes/admin/responsive_build.php(42): S7upfResVCBuildCSS->build_css(‘[vc_row css=”.v…’) #2 /homepages/46/d385559705/htdocs/wp-includes/class-wp-hook.php(309): S7upfResVCBuildCSS->save_post(67658) #3 /homepages/46/d385559705/htdocs/wp-includes/class-wp-hook.php(331): WP_Hook->apply_filters(67658, Array) #4 /homepages/46/d385559705/htdocs/wp-includes/plugin.php(474): WP_Hook->do_action(Array) #5 /homepages/46/d385559705/htdocs/wp-includes/post.php(4687): do_action(‘save_post’, 67658, Object(WP_Post), false) #6 /homepages/46/d385559705/htdocs/wp-includes/revision.php(334): wp_insert_post(Array, true) #7 /homepages/46/d385559705/htdocs/wp-includes/revision.php(190): _wp_put_post_revision(Array) #8 /homepages/46/d385559705/htdocs/wp-includes/class-wp-hook.php(309): wp_save_post_revision(22862) #9 /homepages/46/d385559705/htdocs/wp-includes/class-wp-hook.php(331): WP_Hook->apply_filters(”, Array) #10 /homepages/46/d385559705/htdocs/wp-includes/plugin.php(474): WP_Hook->do_action(Array) #11 /homepages/46/d385559705/htdocs/wp-includes/post.php(4656): do_action(‘post_updated’, 22862, Object(WP_Post), Object(WP_Post)) #12 /homepages/46/d385559705/htdocs/wp-includes/post.php(4789): wp_insert_post(Array, false, true) #13 /homepages/46/d385559705/htdocs/wp-admin/includes/post.php(426): wp_update_post(Array) #14 /homepages/46/d385559705/htdocs/wp-admin/post.php(227): edit_post() #15 {main} thrown in /homepages/46/d385559705/htdocs/wp-content/plugins/7up-core/libs/includes/admin/responsive_build.php on line 58

Any idea how to fix that, please???

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