[basex-talk] An invalid XML character (Unicode: 0x1a) was found in the element content of the document

[Geoff Alexander]

We're getting an "An invalid XML character (Unicode: 0x1a) was found in the
element content of the document" error from a BaseX REST API PUT request We
using BaseX 8.6.7 ( I realize that BaseX 8.6.7 isn't the latest version).
Is this a user error or a BaseX problem?  If it's user error, how would I
fix the error.  If it's a BaseX problem, is it fixed in a more recent BaseX
version.