Unable to export host (1.8.6)

[CeeEss]

Fresh 1.8.6 build on CentOS6.0 x86_64

Zabbix Server v1.8.6 (revision 20932) (4 August 2011)
Compilation time: Aug 31 2011 14:40:42

When i select, then attempt to Export a single host, i get this error:

File not found
Firefox can't find the file at http://10.xx.xx.xx/hosts.php.

Happens under Chrome as well. Of course, hosts.php is there and i can configure new hosts as well as Activate/Disable/Delete/MassUpdate an existing host from the dropdown menu

update:

Also happens when trying to export a Screen:

No web page was found for the web address: http://10.40.50.19/screenconf.php

thanks!

[richlv]

reports -> "status of zabbix" as superadmin - any problems reported ?
notably, php-xml (might be php-dom module) missing.

https://support.zabbix.com/browse/ZBX-3359 might be relevant

[CeeEss]

Installing php-xml did the trick. Thanks, Rich! Should have installed CentOS group "PHP Support" instead of picking and choosing modules based on memory