Knowledge Drop

"Internal Server Error" when saving

  • 5 April 2021
  • 1 reply

Userlevel 5

Last tested: Jun 23, 2020


Please add possible causes as you come across them in the comments!

  1. Check for ad blocker!
  2. Try incognito mode or a different browser- this will pinpoint extensions as the culprit.
  3. Syntax error in LookML also causes this issue sometimes ( such as json format error/ the issue with dimension etc..)


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1 reply

I also was just experiencing this. I had a particularly long view and any attempt to add more characters caused me to get a 403 and an “Internal Server Error.” My devops team were able to establish that this was because we used “AWS WAF” for security and there is a rule called


They were able to add a restriction that bypassed this and stopped me from getting the 403. Just in case others experience this