I have installed ZIMBRA 8.6 on CentOS 7 and I have changed the

zmprov modifyConfig zimbraFileUploadMaxSize 5000000
zmprov mcf zimbraMtaMaxMessageSize 52428800

I have restarted the mailbox

Then I can't access to my zimbra webmail with the proxy address so I have checked the proxy server and I have restarted it.

then I have this issue

Starting zmconfigd...Done.
Starting memcached...Done.
Starting proxy...Failed. Starting nginx...nginx: [emerg] could not build the server_names_hash, you should increase either server_names_hash_max_size: 512 or server_names_hash_bucket_size: 64 failed.

I have followed this article here and I changed it and no way.

any suggest !! thanks