Export of registry.xml via portal_setup failed under Plone 5.2 Py3

[1letter]

BUG/PROBLEM REPORT

What I did:

• Install coredev buildout py2py3 via CoredevMultiPy
• add Plone Site
• got to ZMI -> plonesite -> portal_setup -> export -> check 'Export the configuration registry schemata Exports records and settings' -> click 'Export Selected Steps'

What I expect to happen:

• Download of a setup_tool-xxxx.tar.gz File

What actually happened:

Traceback:

Traceback (innermost last):
  Module ZPublisher.WSGIPublisher, line 128, in transaction_pubevents
  Module ZPublisher.WSGIPublisher, line 276, in publish_module
  Module ZPublisher.WSGIPublisher, line 210, in publish
  Module ZPublisher.mapply, line 85, in mapply
  Module Products.PDBDebugMode.wsgi_runcall, line 60, in pdb_runcall
  Module Products.GenericSetup.tool, line 646, in manage_exportSelectedSteps
  Module Products.GenericSetup.tool, line 1298, in _doRunExportSteps
  Module plone.app.registry.exportimport.handler, line 94, in exportRegistry
  Module Products.GenericSetup.context, line 442, in writeDataFile
ValueError: Unicode text is not supported, even if it only contains ascii. Please encode your data. See GS 1.7.0 changes for more

But when i go to Plone Site -> portal_registry -> export and click the button 'Export Now', all is fine. i get a downloadfile registry.xml

What version of Plone/ Addons I am using:

• Plain Buildout Coredev 5.2 with Py3

It did not happen with the same procedure on Py2 Version of Plone 5.2

[gforcada]

Fixed with https://github.com/plone/plone.app.registry/pull/35 right?