View source for JavaScript error encountered in method ZaOverviewPanelController.prototype. overviewTreeListener" error while opening Network Modules NG in admin console

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=Javascript overviewTreeListener error while opening Network Modules NG in admin console= 
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{{KB|{{WIP}}|{{ZCS 8.8}}|{{ZCS 9.0}}|||}} 


====Problem====
After installing the latest patch, attempts to use any of the modules in the Network Modules NG section of the Zimbra Administration web console produce the error <code><nowiki> JavaScript error encountered in method ZaOverviewPanelController.prototype._overviewTreeListener</nowiki></code>.

====Solution====

=====Step 1=====  
* Try to redeploy the zextras zimlets on affected mailbox server following below steps,

<pre>
cd /opt/zimbra/zimlets
zmzimletctl undeploy com_zextras_client
zmzimletctl undeploy com_zextras_zextras
zmzimletctl deploy com_zextras_client.zip
zmzimletctl deploy com_zextras_zextras.zip
zmprov fc -a all
zmmailboxdctl restart
</pre>

* Then clear the browser cache and try again.

If step 1 solve the issue then ignore step 2 else follow step 2.

=====Step 2=====
* Try reinstalling the <code><nowiki>zimbra-network-modules-ng</nowiki></code> package on affected mailbox server.


For RHEL/Centos:
<pre>
yum reinstall zimbra-network-modules-ng
zmmailboxdctl restart
</pre>

Or

For Ubuntu:
<pre>
apt-get --reinstall install zimbra-network-modules-ng
zmmailboxdctl restart
</pre>

* Then clear the browser cache and try again.

::

If issue persist, then contact Zimbra support for further troubleshooting the issue.


{{SubmittedBy|Vivek Dhande}}

{{Article Footer|ZCS 8.8,9.0|2022-02-23}}