Warning: require(/home/.sites/89/site1187403/web/werkstatt/wp-content/plugins/tenweb-speed-optimizer/OptimizerApi.php): Failed to open stream: No such file or directory in /home/.sites/89/site1187403/web/werkstatt/wp-content/plugins/tenweb-speed-optimizer/tenweb_speed_optimizer.php on line 227

Fatal error: Uncaught Error: Failed opening required '/home/.sites/89/site1187403/web/werkstatt/wp-content/plugins/tenweb-speed-optimizer/OptimizerApi.php' (include_path='.:/usr/share/pear') in /home/.sites/89/site1187403/web/werkstatt/wp-content/plugins/tenweb-speed-optimizer/tenweb_speed_optimizer.php:227
Stack trace:
#0 /home/.sites/89/site1187403/web/werkstatt/wp-includes/class-wp-hook.php(324): two_init('')
#1 /home/.sites/89/site1187403/web/werkstatt/wp-includes/class-wp-hook.php(348): WP_Hook->apply_filters(false, Array)
#2 /home/.sites/89/site1187403/web/werkstatt/wp-includes/plugin.php(517): WP_Hook->do_action(Array)
#3 /home/.sites/89/site1187403/web/werkstatt/wp-settings.php(559): do_action('plugins_loaded')
#4 /home/.sites/89/site1187403/web/werkstatt/wp-config.php(84): require_once('/home/.sites/89...')
#5 /home/.sites/89/site1187403/web/werkstatt/wp-load.php(50): require_once('/home/.sites/89...')
#6 /home/.sites/89/site1187403/web/werkstatt/wp-blog-header.php(13): require_once('/home/.sites/89...')
#7 /home/.sites/89/site1187403/web/werkstatt/index.php(17): require('/home/.sites/89...')
#8 {main}
  thrown in /home/.sites/89/site1187403/web/werkstatt/wp-content/plugins/tenweb-speed-optimizer/tenweb_speed_optimizer.php on line 227