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Add-ins no longer displaying input screens after upgrade to 8.03 or 8.07 on HF


Hi there,

came across an issue on our HF's when trying to install a Splunkbase application called WebTools.

Suddenly all my apps installed on the heavy forwarers no longer want to display the input pages of many Splunk and non-Splunk Add-Ins.

The common pattern in weblogs seems to be :


2020-12-08 18:40:07,506 ERROR [5fd00ed77f7f53e84e3810] error:335 -
Traceback (most recent call last):
File "/opt/splunk/lib/python3.7/site-packages/cherrypy/", line 628, in respond self._do_respond(path_info)
File "/opt/splunk/lib/python3.7/site-packages/cherrypy/", line 684, in _do_respond'before_handler')
File "/opt/splunk/lib/python3.7/site-packages/cherrypy/", line 114, in run raise exc
File "/opt/splunk/lib/python3.7/site-packages/cherrypy/", line 104, in run hook()
File "/opt/splunk/lib/python3.7/site-packages/cherrypy/", line 63, in __call__ return self.callback(**self.kwargs)
File "/opt/splunk/lib/python3.7/site-packages/cherrypy/", line 182, in _wrapper if self.callable(**kwargs):
File "/opt/splunk/lib/python3.7/site-packages/splunk/appserver/mrsparkle/lib/", line 54, in custom_staticdir filename = resolver(section, branch, dir)
File "/opt/splunk/lib/python3.7/site-packages/splunk/appserver/mrsparkle/", line 283, in static_resolver return static_app_resolver(section, branch, static_app_dir)
File "/opt/splunk/lib/python3.7/site-packages/splunk/appserver/mrsparkle/", line 269, in static_app_resolver i18n_cache = i18n.translate_js(fn)
File "/opt/splunk/lib/python3.7/site-packages/splunk/appserver/mrsparkle/lib/", line 908, in translate_js f.write(filename_contents)
UnicodeEncodeError: 'latin-1' codec can't encode character '\u2019' in position 37632: ordinal not in range(256)


I did some test to play around with the locales of the Splunk user but this did not resolve the issue.

Any ideas what to try next ? I also opened a ticket with Splunk.


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0 Karma


That looks like a Python3 compatibility problem.  Did you run the Splunk Upgrade Readiness app before upgrading to Splunk 8?  Doing so should have identified the problem and suggested a fix.

If this reply helps you, Karma would be appreciated.
0 Karma


W never needed both applications in question before:


Workday Add-In


Same happens for AWS Add-In written by Splunk now.


Both are supported on the version of the HF we are running. They also work in our testbed on windows on the same Release.

0 Karma
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