CRITICAL Uncaught ValueError

Hi, I’m getting this errors in my error log:

CRITICAL Uncaught ValueError: fread(): Argument #2 ($length) must be greater than 0 in /home/xxx/public_html/wp-content/themes/enfold/framework/php/function-set-avia-backend.php:1146
Stack trace:
#0 /home/xxx/public_html/wp-content/themes/enfold/framework/php/function-set-avia-backend.php(1146): fread()
#1 /home/xxx/public_html/wp-content/themes/enfold/functions-enfold.php(2344): avia_backend_create_file()
#2 /home/xxx/public_html/wp-includes/class-wp-hook.php(308): avia_generate_stylesheet()
#3 /home/xxx/public_html/wp-includes/class-wp-hook.php(332): WP_Hook->apply_filters()
#4 /home/xxx/public_html/wp-includes/plugin.php(517): WP_Hook->do_action()
#5 /home/xxx/public_html/wp-content/themes/enfold/framework/php/function-set-avia-backend.php(118): do_action()
#6 /home/xxx/public_html/wp-includes/class-wp-hook.php(308): avia_update_helper->update_version()
#7 /home/xxx/public_html/wp-includes/class-wp-hook.php(332): WP_Hook->apply_filters()
#8 /home/xxx/public_html/wp-includes/plugin.php(517): WP_Hook->do_action()
#9 /home/xxx/public_html/wp-settings.php(645): do_action()
#10 /home/xxx/public_html/wp-config.php(118): require_once('/home/xxx/...')
#11 /home/xxx/public_html/wp-load.php(50): require_once('/home/xxx/...')
#12 /home/xxx/public_html/wp-blog-header.php(13): require_once('/home/xxx/...')
#13 /home/xxx/public_html/index.php(17): require('/home/xxx/...')
#14 {main}
  thrown dans /home/xxx/public_html/wp-content/themes/enfold/framework/php/function-set-avia-backend.php à la ligne 1146

Please advise…