Fatal error when tried to delete cachify

Cachify 2.2.1 on https://sommer-in-hamburg.de/

Website complete gone when deinstall plugin. Only this is seeing:
“Warning: Unknown: failed to open stream: No such file or directory in Unknown on line 0

Fatal error: Unknown: Failed opening required ‘/www/htdocs/xxx/wp-content/plugins/cachify/apc/proxy.php’ (include_path=’.:/usr/share/php:..’) in Unknown on line 0

https://www.ads-software.com/plugins/cachify/