If you’re experiencing problems where attempting to save a question or dashboard sometimes fails, or Metabase only loads a blank page, this might be caused by the use of a proxy.
A proxy could include other functions like a web application firewall (WAF), content optimization, or cache.
Examples of proxies that are known to cause issues with Metabase:
If saving questions/dashboards fails with the save button changing to “Save Failed,” or perhaps with the error, “Sorry you do not have permission to see that,” this might be caused by either a WAF like Cloudflare or Azure.
Some WAFs have dynamic protection, which means that the problem might only occur after an upgrade of Metabase, and might go away after a few days.
The solution is to disable the WAF for Metabase. Some services will show which rules were triggered, so it might be enough to disable those rules.
If Metabase just loads a blank page instead of the interface, then it is usually caused by content optimization like PageSpeed or Cloudflare’s Rocket Loader.
<title>Metabase</title>near line 25.
The solution is to disable the content optimization for Metabase.