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Troubleshooting: Chrome 73.0.3683.86 (64-bit) blocks saving a ruleset instance

Chrome Version 73.0.3683.86 (Official Build) (64-bit) blocks saving a ruleset instance.
Learn what causes this issue and how to prevent it from happening to you.


As an application developer, you cannot save RuleSet versions in Chrome after an update to Chrome, Version 73.0.3683.86 (Official Build) (64-bit). Chrome 73.0.3683.86 passes unexpected user values in hidden fields when you try to save a ruleset instance.


The Ruleset form displays the following error when you click Save:

[user name] does not exist or is not a valid entry for this ruleset and its prerequisites 


Error for Edit and Save ruleset
"Error for Edit and Save ruleset"
Error for Edit and Save ruleset


To reproduce this issue, update Chrome to the latest build, Version 73.0.3683.86 (Official Build) (64-bit), which was released on March 20, 2019. See the Chrome Releases page for Stable Channel Update for Desktop,

Important condition

When prompted by Chrome to save your authentication credentials, you must save the user name and password that you use to log in to your Pega application. If you do not do this, you will not be able to reproduce the issue.

Steps to reproduce and understand the issue


  • Use Chrome Version 73.0.3683.86 (Official Build) (64-bit).
  • Enable the Chrome setting that saves user names and passwords.


  1. Connect to your Pega application server.
  2. Log in with the user name
  3. When prompted by Chrome, choose to save the password used with the user name in Step 2.
    The Chrome Save Password prompt
    "The Chrome Save Password prompt"
    The Chrome Save Password prompt
  4. Open a ruleset of type Standard in Edit mode.
  5. Click Save and see the error:
    This record has 1 error(s) in 1 place(s) .

    pyComponentInterfaceClass— does not exist or is not a valid entry for this ruleset and its prerequisites.


Choose any one of the following suggested approaches.

Use an Incognito session of Chrome

Chrome Incognito mode does not save your browsing history, cookies, site data, or information entered in forms. Running Chrome in Incognito prevents the auto-filling of your user name in the ruleset page in Pega. The error does not occur.

To run an Incognito session of Chrome, see the following Google Chrome support answer, 95464: Browser in private

Clear saved credentials and stop future prompts to save credentials

To clear any saved user name and password combinations that you use for logging into the Pega application with Chrome, see the following Google Chrome support answer, 95606:
Managed Saved Passwords

Use a different browser

If the previous suggested approaches do not work for you, change your browser.

When saving a ruleset instance, use an alternative browser, for example, Firefox, Edge or Internet Explorer.


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