TypeError Issue when installing collective.contact.core

Plone Support Add-on Development
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1

Hi,

I get the below error when I install collective.contact.core, I get this error occasionally when I install some other addons, also i am using Plone 6 with python 3.9 any help will be appreciated.

File "/home/midhexe/Plone-6/eggs/plone.formwidget.masterselect-1.7-py3.9-linux-x86_64.egg/plone/formwidget/masterselect/widget.py", line 128, in MasterSelectWidget
implements(IMasterSelectWidget)
File "/home/midhexe/Plone-6/lib/python3.9/site-packages/zope/interface/declarations.py", line 778, in implements
raise TypeError(_ADVICE_ERROR % 'implementer')
zope.configuration.xmlconfig.ZopeXMLConfigurationError: File "/home/midhexe/Plone-6/lib/python3.9/site-packages/Products/CMFPlone/meta.zcml", line 38.4-42.10
File "/home/midhexe/Plone-6/parts/instance/etc/site.zcml", line 12.2-12.39
TypeError: Class advice impossible in Python3. Use the @implementer class decorator instead.
sys:1: ResourceWarning: unclosed <socket.socket fd=6, family=AddressFamily.AF_INET, type=SocketKind.SOCK_STREAM, proto=0, laddr=('0.0.0.0', 8080)>

2

Midhlaj Nk via Plone Community wrote at 2023-2-1 08:44 +0000:

...
TypeError: Class advice impossible in Python3. Use the @implementer class decorator instead.

This error indicates that you are using a version which is not
Python 3 compatible.

Check whether there is a newer Python 3 compatible version.
Contact the author is this is not the case.