No error message appears to users, the behavior can be summarized in the following screenshots where the user named 'Test User1' would have permissions to view the following archives:
EMAIL Archive Type
Test User1
Test User2
Test User3
Test User4
FILE Archive Type
Marketing
Finance
Support
1. EVS opens showing a limited number of archives under 'FILE' archive group

2. After having clicked on 'FILE' archive group all the archives are shown for the given group

3. Leaving the 'EMAIL' archive group with an incomplete list:

4. An additional refresh of the browser upon 'EMAIL' shows the complete list for the chosen group but returns incomplete for 'FILE' archive group

The aforementioned behavior has been observed in sites with complex and hierarchical mesh of active directory distribution lists and combinations of inherited 'granted' or 'denied' permissions.
Beginning with Enterprise Vault 14.2.1 a workaround to this issue exists where the Enterprise Vault administrator may create the following custom registry key on the Enterprise Vault server(s):
HKEY_LOCAL_MACHINE\SOFTWARE\Wow6432Node\KVS\Enterprise Vault\OnlineWebSearch\
AllArchiveTypes=DWORD:00000001
Note: A value of ‘1’ (one) indicates that the permissible archives of all Archive-Types will be fetched by the Enterprise Vault Search console. The default value is ‘0’ (zero).
After the creation of this registry value, perform an IISreset operation or restart the Enterprise Vault server.
Warning: Incorrect use of the Windows registry editor may prevent the operating system from functioning properly. Great care should be taken when making changes to a Windows registry. Registry modifications should only be carried-out by persons experienced in the use of the registry editor application. It is recommended that a complete backup of the registry and workstation be made prior to making any registry changes.