Symptoms

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Knowledge > Create New leads to a blank/empty screen

Cause

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Incorrect attribute format.

Resolution

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This is seen due to incorrect attribute value added to 'text' field (Article body) on Knowledge table. Please see the 'Attributes' column on the text dictionary entry: 

<Instance name>/nav_to.do?uri=sys_dictionary.do?sys_id=b502e231dba01300673d4980399619c0%26sysparm_view=advanced

Current value: 
serializer=com.glide.script.TranslatedTextXMLSerializer.html_sanitizer=false,edge_encryption_enabled=true 

Please note, there is a period character being used to separate 'Translated serializer' and 'HTML sanitizer'. The separator should be a comma (,) character as opposed to a period. 

Updated value: 
serializer=com.glide.script.TranslatedTextXMLSerializer,html_sanitizer=false,edge_encryption_enabled=true 

Additional Information

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Enable sanitization on individual fields

https://docs.servicenow.com/csh?topicname=t_EnSanitizIndFlds.html&version=latest