One of your portlets does not work for one user only. You get "ERROR" and nothing else. Restoring defaults does not work
The issue is caused by a corrupt filter on this portlet which is why restoring defaults does not work.
Release : All Supported Clarity releases
Component : CLARITY STUDIO
FROM cmn_attribute_value_sets a
WHERE a.view_code = 5026088
AND a.user_id = 5289155 order by a.name
SELECT * FROM odf_filter_expressions
WHERE object_code = 5333564
AND object_instance_id = 5753877
2. Once you identified the correct filter, run the query to fix the issue:
set expression ='1==1'
where id =5000000
3. Flush the caches before testing again