A suggested workaround is to add an entry “LogBootPerfMetricsOnAppDisposeIsEnabled=(System.Boolean)True”
in the file "C:\Program Files\Microsoft Office Web Apps\WebWordViewer\Settings_Service.ini"
and then restart the OOS services.
The setting LogBootPerfMetricsOnAppDisposeIsEnabled
is related to the performance metrics logging during the disposal of an app in the Office Online Server. When set to True
, it ensures that the performance metrics are sent when the app is closed, which helps to avoid a race condition that could cause the error message you've been experiencing.