Trying to a open portal on pega constellation application and getting error pzpega_ui_harnesscontext_1898501394!pzevalharnessjson_12386624562.js!pzpega_ui_lib_provider_1192545…:58 Learn more . Any suggestions how to fix this

User Experience
1

trying to a open portal on pega constellation application and getting error pzpega_ui_harnesscontext_1898501394!pzevalharnessjson_12386624562.js!pzpega_ui_lib_provider_1192545…:58 Learn more . Any suggestions how to fix this

Also on developer tool console we see

asset-loader.initServer(https://release.constellation.pega.io/cs/25.1.3-102459/react/prod/, no-appstatic)
asset-loader.ts:964 asset-loader.initServer() staticServerURL=https://release.constellation.pega.io/cs/25.1.3-102459/react/prod/, appStaticUrl=https://release.constellation.pega.io/cs/25.1.3-102459/react/prod/, pegaOnlyUrl=true)

2

I understand you’re experiencing issues loading your Constellation Portal. Based on the error messages you’re seeing, this appears to be related to the Dynamic System Settings configuration for Constellation URLs. Here’s how to resolve this:

Verify and correct your Dynamic System Settings:

  1. Log in to Dev Studio or Pega Infinity Studio
  2. In the navigation pane, click Records
  3. Expand SysAdmin, then click Dynamic System Settings
  4. In the Setting Purpose column, click Filter
  5. In the Search Text field, enter ConstellationPegaStaticURL, then click Apply
  6. Open the setting and ensure the Value field contains the appropriate URL for your environment
  7. Click Save
  8. Repeat steps 4-7 for ConstellationSvcURL

Verify your application UI Runtime settings:

  1. In the header of Dev Studio/Pega Infinity Studio, click the name of your application
  2. Click Definition (or View Application Rule in version 26)
  3. Expand the Advanced section
  4. In the UI Runtime section, select Pega Platform (Constellation UI) to use the fully React-based UI
  5. Click Generate routing table
  6. Click Save

Additional checks:

If the issue persists, verify that your operator-level security settings are correct. The operator-level Constellation Service URL and Constellation Pega Static URL fields should either be blank or configured correctly to match your environment’s URLs.

After making these changes, refresh your browser and try loading the Portal again. The console message you’re seeing suggests the system is attempting to load Constellation assets, so ensuring these URLs are properly configured should resolve the loading issue.

3

Did you perform an recent upgrade? I have experienced similar issue after 25.1.3 upgrade. It worked after server restart.

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Yes we had a pega upgrade Pega Infinity '25.1.3 in recent time

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Restart helped . Thanks

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Please check and guide if below is related, I am trying to open a portal in preview and I am getting this error: The channel ‘’ is not compatible with React-based UI. Select a different channel or create a new one.
when I verified, I have value for Constellation Pega Static URL and Constellation Service URL is blank, I verified the UI engine in App Definition.