Hello Pepe,
yes it is right - it was in step 6 or in step 7 of updating there.
Here is html-file, which I got for turris-update-error.
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<body>
<div id="page">
<h1>An unexpected error has occurred</h1>
<p>We are sorry, but your request raised an unexpected error. More information about this error may be found below.</p>
<p>If you are willing to help us with fixing of the problem, download the following <a href="/foris/wizard/foris-error.html">error protocol</a> and send it to us with a short description of the steps that led to the error to our email address <a href="mailto:tech.support@turris.cz">tech.support@turris.cz</a> (the protocol contains only a copy of the following informations).</p>
<hr>
<h1>Při zpracování požadavku došlo k chybě</h1>
<p>Omlouváme se, ale během zpracování Vašeho požadavku došlo k nečekané chybě. Detailní informace naleznete níže.</p>
<p>Pokud nám chcete pomoci s odstraněním chyby, stáhněte následující <a href="/foris/wizard/foris-error.html">protokol o chybě</a> a zašlete nám jej s krátkým popisem okolností vzniku chyby na adresu <a href="mailto:tech.support@turris.cz">tech.support@turris.cz</a> (protokol obsahuje pouze kopii informací uvedených na této stránce).</p>
<hr>
<h2 class="error">RPCError('Failed to wipe updater: Error during exec: No such file or directory',)</h2>
<h3>Stack trace</h3>
<pre>Traceback (most recent call last):
File "/usr/lib/python2.7/site-packages/foris/middleware/reporting.py", line 93, in __call__
return self.app(environ, start_response)
File "/usr/lib/python2.7/site-packages/foris/middleware/backend_data.py", line 68, in __call__
return self.app(environ, start_response)
File "/usr/lib/python2.7/site-packages/bottle_i18n.py", line 68, in __call__
return self.app(e,h)
File "/usr/lib/python2.7/site-packages/bottle.py", line 979, in __call__
return self.wsgi(environ, start_response)
File "/usr/lib/python2.7/site-packages/bottle.py", line 954, in wsgi
out = self._cast(self._handle(environ))
File "/usr/lib/python2.7/site-packages/bottle.py", line 862, in _handle
return route.call(**args)
File "/usr/lib/python2.7/site-packages/bottle.py", line 682, in mountpoint_wrapper
body = app(request.environ, start_response)
File "/usr/lib/python2.7/site-packages/bottle.py", line 979, in __call__
return self.wsgi(environ, start_response)
File "/usr/lib/python2.7/site-packages/bottle.py", line 954, in wsgi
out = self._cast(self._handle(environ))
File "/usr/lib/python2.7/site-packages/bottle.py", line 862, in _handle
return route.call(**args)
File "/usr/lib/python2.7/site-packages/bottle.py", line 1740, in wrapper
rv = callback(*a, **ka)
File "/usr/lib/python2.7/site-packages/foris/utils/__init__.py", line 80, in wrapper
return func(*args, **kwargs)
File "/usr/lib/python2.7/site-packages/foris/wizard/__init__.py", line 474, in step
return wiz.render(stepnumber=number)
File "/usr/lib/python2.7/site-packages/foris/wizard/__init__.py", line 341, in render
status = client.get_updater_status()
File "/usr/lib/python2.7/site-packages/foris/nuci/client.py", line 386, in get_updater_status
data = get(filter=filters.updater)
File "/usr/lib/python2.7/site-packages/foris/nuci/client.py", line 163, in get
data = netconf.get(filter=("subtree", filter) if filter is not None else None).data_ele
File "/usr/lib/python2.7/site-packages/ncclient/manager.py", line 89, in wrapper
return self.execute(op_cls, *args, **kwds)
File "/usr/lib/python2.7/site-packages/foris/nuci/client.py", line 113, in execute
raise_mode=cls._raise_mode).request(*args, **kwargs)
File "/usr/lib/python2.7/site-packages/ncclient/operations/retrieve.py", line 65, in request
return self._request(node)
File "/usr/lib/python2.7/site-packages/ncclient/operations/rpc.py", line 289, in _request
raise self._reply.error
RPCError: Failed to wipe updater: Error during exec: No such file or directory
</pre>
<h3>Environment</h3>
<pre>{'CONTENT_LENGTH': '0',
'DOCUMENT_ROOT': '/www',
'GATEWAY_INTERFACE': 'CGI/1.1',
'HTTP_ACCEPT': 'text/html,application/xhtml+xml,application/xml;q=0.9,image/webp,image/apng,*/*;q=0.8',
'HTTP_ACCEPT_ENCODING': 'gzip, deflate',
'HTTP_ACCEPT_LANGUAGE': 'de-DE,de;q=0.9,en-US;q=0.8,en;q=0.7',
'HTTP_CACHE_CONTROL': 'max-age=0',
'HTTP_CONNECTION': 'keep-alive',
'HTTP_COOKIE': 'foris.session=00d46c9998c078bc65884042e9e24a31; foris.ws.session=25438d74349b3d636e35e506e06fbf92',
'HTTP_HOST': '192.168.1.1',
'HTTP_REFERER': 'http://192.168.1.1/foris/wizard/',
'HTTP_UPGRADE_INSECURE_REQUESTS': '1',
'HTTP_USER_AGENT': 'Mozilla/5.0 (X11; Linux x86_64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/66.0.3359.181 Safari/537.36',
'PATH_INFO': '/main/step/7',
'PATH_TRANSLATED': '/www/main/step/7',
'QUERY_STRING': '',
'REDIRECT_STATUS': '200',
'REMOTE_ADDR': '192.168.1.101',
'REMOTE_PORT': '34796',
'REQUEST_METHOD': 'GET',
'REQUEST_SCHEME': 'http',
'REQUEST_URI': '/foris/wizard/main/step/7',
'SCRIPT_FILENAME': '/www/foris/wizard',
'SCRIPT_NAME': '/foris/wizard',
'SERVER_ADDR': '192.168.1.1',
'SERVER_NAME': '192.168.1.1',
'SERVER_PORT': '80',
'SERVER_PROTOCOL': 'HTTP/1.1',
'SERVER_SOFTWARE': 'lighttpd/1.4.47',
'bottle.app': <bottle.Bottle object at 0x17275f0>,
'bottle.raw_path': '/step/7',
'bottle.request': <LocalRequest: GET http://192.168.1.1/foris/wizard/main/step/7>,
'bottle.request.urlparts': SplitResult(scheme='http', netloc='192.168.1.1', path='/foris/wizard/main/step/7', query='', fragment=''),
'bottle.route': <GET '/step/<number:re:\\d+>' <function step at 0x17aec60>>,
'foris.backend': UbusSender('/var/run/ubus.sock'),
'foris.language': u'en',
'foris.session': <foris.middleware.sessions.SessionForisProxy object at 0x18dc020>,
'foris.session.data': {u'allowed_step_max': 8,
u'csrf_token': u'ok1eiVZlOmievPOtFmcpk0tmtr2rpYFE',
u'user_authenticated': True,
u'wizard_finished': False},
'foris.session.id': u'00d46c9998c078bc65884042e9e24a31',
'foris.version': '97.11',
'route.handle': <GET '/step/<number:re:\\d+>' <function step at 0x17aec60>>,
'route.url_args': {'number': '7'},
'wsgi.errors': <flup.server.fcgi_base.OutputStream object at 0x18daf70>,
'wsgi.input': <flup.server.fcgi_base.InputStream object at 0x1a59590>,
'wsgi.multiprocess': False,
'wsgi.multithread': True,
'wsgi.run_once': False,
'wsgi.url_scheme': 'http',
'wsgi.version': (1, 0)}</pre>
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