List pages with modeled queries, that have been applied added fields via personalization may encounter an error in Platform Update 5 and cause a server crash.
One example of such form is Project Invoices form.
The fix for this item is being rolled out as a hotfix and part of next version.
As a mitigation, personalization can be turned off or removed from this particular form until the hotfix is applied.
This can be done directly by the user in its own environment: by accessign User Options->Usage Data and under the form setup tab select the form name (i.e. ProjInvoiceListPage) and deleting this record.
An admin can do this action on behalf of a user from System Administration->Personalization form.
Personalization can be globally turned off via the option under System Administration->Client Performance Options (Enable personalization option)