Problem adding a new log to an exiting task

[Roy]

When adding a new log to an existing task, pressing update task produces a blank page, and the task is not updated.

Any ideas?

This is on a linux installation, other operations such as creating tasks, adding files, creating users etc... all seem to function fine.

[caseydk]

Have you looked at the TaskLog to make sure that your entry is not there?

[Roy]

Yes I've checked, there are no entries in the task logs

[Roy]

Mystery solved, the package php-xml was not present on this linux installation of php. Adding this package and restarting Apache did the trick.