I just set the PHP into 5.4, now it could be activated. Thank you very much for your help!
The nocice says:
Parse error: syntax error, unexpected T_FUNCTION in /home/lucybeebee0lbukcfy8b3edelbgeve/wwwroot/wp-content/plugins/woocommerce-quickpay/woocommerce-quickpay.php on line 1318
