Uploading a text file or an xml file do not work as expected.
<code>
Caused by: java.lang.NullPointerException
at info.magnolia.dam.asset.field.DamUploadField.createCompletedActionLayout(DamUploadField.java:150)
at info.magnolia.ui.form.field.upload.basic.BasicUploadField.buildCompletedLayout(BasicUploadField.java:208)
at info.magnolia.ui.form.field.upload.AbstractUploadField.updateDisplay(AbstractUploadField.java:158)
at info.magnolia.ui.form.field.upload.AbstractUploadField.uploadFailed(AbstractUploadField.java:398)
at info.magnolia.ui.form.field.upload.AbstractUploadField.uploadFinished(AbstractUploadField.java:374)
</code>