site = pywikibot.Site("wikidata", "wikidata")
item = pywikibot.ItemPage(site, "Q4115189")
claim = pywikibot.Claim(site, "P580")
claim.setTarget(pywikibot.WbTime(year=2022, hour=5, precision=11))
item.addClaim(claim)

WARNING: API error modification-failed: Malformed input: +2022-01-01T05:00:00Z
---------------------------------------------------------------------------
APIError                                  Traceback (most recent call last)
File /srv/paws/pwb/pywikibot/page/_decorators.py:34, in _allow_asynchronous.<locals>.handle(func, self, *args, **kwargs)
     33 try:
---> 34     func(self, *args, **kwargs)
     35 # TODO: other "expected" error types to catch?

File /srv/paws/pwb/pywikibot/page/_wikibase.py:740, in WikibasePage.addClaim(self, claim, bot, **kwargs)
    738     raise ValueError(
    739         'The provided Claim instance is already used in an entity')
--> 740 self.repo.addClaim(self, claim, bot=bot, **kwargs)
    741 claim.on_item = self

File /srv/paws/pwb/pywikibot/site/_decorators.py:92, in need_right.<locals>.decorator.<locals>.callee(self, *args, **kwargs)
     89     raise UserRightsError('User "{}" does not have required '
     90                           'user right "{}"'
     91                           .format(self.user(), right))
---> 92 return fn(self, *args, **kwargs)

File /srv/paws/pwb/pywikibot/site/_datasite.py:324, in DataSite.addClaim(self, entity, claim, bot, summary)
    323 req = self.simple_request(**params)
--> 324 data = req.submit()
    325 # Update the item

File /srv/paws/pwb/pywikibot/data/api/_requests.py:1108, in Request.submit(self)
   1106     pywikibot.log('           response=\n{}'.format(result))
-> 1108     raise pywikibot.exceptions.APIError(**error)
   1109 except TypeError:

APIError: modification-failed: Malformed input: +2022-01-01T05:00:00Z
[messages: [{'name': 'wikibase-validator-malformed-value', 'parameters': ['+2022-01-01T05:00:00Z'], 'html': {'*': 'Malformed input: +2022-01-01T05:00:00Z'}}];
 servedby: mw1402;
 help: See https://www.wikidata.org/w/api.php for API usage. Subscribe to the mediawiki-api-announce mailing list at &lt;https://lists.wikimedia.org/postorius/lists/mediawiki-api-announce.lists.wikimedia.org/&gt; for notice of API deprecations and breaking changes.]

During handling of the above exception, another exception occurred:

OtherPageSaveError                        Traceback (most recent call last)
Cell In[24], line 1
----> 1 item.addClaim(claim)

File /srv/paws/pwb/pywikibot/page/_decorators.py:55, in _allow_asynchronous.<locals>.wrapper(self, *args, **kwargs)
     53     pywikibot.async_request(handle, func, self, *args, **kwargs)
     54 else:
---> 55     handle(func, self, *args, **kwargs)

File /srv/paws/pwb/pywikibot/page/_decorators.py:47, in _allow_asynchronous.<locals>.handle(func, self, *args, **kwargs)
     45         if isinstance(err, PageSaveRelatedError):
     46             raise err
---> 47         raise OtherPageSaveError(self, err)
     48 if callback:
     49     callback(self, err)

OtherPageSaveError: Edit to page [[wikidata:Q4115189]] failed:
modification-failed: Malformed input: +2022-01-01T05:00:00Z
[messages: [{'name': 'wikibase-validator-malformed-value', 'parameters': ['+2022-01-01T05:00:00Z'], 'html': {'*': 'Malformed input: +2022-01-01T05:00:00Z'}}];
 servedby: mw1402;
 help: See https://www.wikidata.org/w/api.php for API usage. Subscribe to the mediawiki-api-announce mailing list at &lt;https://lists.wikimedia.org/postorius/lists/mediawiki-api-announce.lists.wikimedia.org/&gt; for notice of API deprecations and breaking changes.]