Problem with Plone 5.0.8. site

Hello everyone,
I apologise if question is not in place, I'm just not to much of an expert for Plone. I have problem with site. It is Plone 5.0.8 and it is on Win Server 2008 r2 Standard. Last week for some reason this server restarted, and seems that after that Plone site will no longer go up, previously it was working fine for long time. I tried to restart instance and it seems as it goes up but throws this error:

2020-05-11 20:26:56 ERROR Application Could not import Products.CMFEditions
Traceback (most recent call last):
  File "c:\plone5\eggs\zope2-2.13.26-py2.7.egg\OFS\Application.py", line 606, in
 import_product
    product=__import__(pname, global_dict, global_dict, silly)
  File "c:\plone5\eggs\products.cmfeditions-2.2.23-py2.7.egg\products\CMFEdition
s\__init__.py", line 47, in <module>
    ArchivistTool.ArchivistTool,
AttributeError: 'module' object has no attribute 'ArchivistTool'
Traceback (most recent call last):
  File "C:\Plone5\parts\instance\bin\interpreter-script.py", line 282, in <modul
e>
    exec(compile(__file__f.read(), __file__, "exec"))
  File "c:\plone5\eggs\zope2-2.13.26-py2.7.egg\Zope2\Startup\run.py", line 76, i
n <module>
    run()
  File "c:\plone5\eggs\zope2-2.13.26-py2.7.egg\Zope2\Startup\run.py", line 22, i
n run
    starter.prepare()
  File "c:\plone5\eggs\zope2-2.13.26-py2.7.egg\Zope2\Startup\__init__.py", line
92, in prepare
    self.startZope()
  File "c:\plone5\eggs\zope2-2.13.26-py2.7.egg\Zope2\Startup\__init__.py", line
268, in startZope
    Zope2.startup()
  File "c:\plone5\eggs\zope2-2.13.26-py2.7.egg\Zope2\__init__.py", line 47, in s
tartup
    _startup()
  File "c:\plone5\eggs\zope2-2.13.26-py2.7.egg\Zope2\App\startup.py", line 69, i
n startup
    OFS.Application.import_products()
  File "c:\plone5\eggs\zope2-2.13.26-py2.7.egg\OFS\Application.py", line 583, in
 import_products
    import_product(product_dir, product_name, raise_exc=debug_mode)
  File "c:\plone5\eggs\zope2-2.13.26-py2.7.egg\OFS\Application.py", line 606, in
 import_product
    product=__import__(pname, global_dict, global_dict, silly)
  File "c:\plone5\eggs\products.cmfeditions-2.2.23-py2.7.egg\products\CMFEdition
s\__init__.py", line 47, in <module>
    ArchivistTool.ArchivistTool,
AttributeError: 'module' object has no attribute 'ArchivistTool'

Now I'm bit stuck with this. I would like to upgrade this site but in meantime put it up to be available.
Any advices or something?

Just a wild guess (this might be complete wrong) because of the import problem: Did you (accidentally) upgrade the underlying Python from Version 2.7 to a 3.x? Plone 5.0 needs Python 2.7.

No. Python 2.7. is installed in this machine.

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