Greetings ,
Hope you are doing well.
The "Error validating SAML message" is common when there are issues with SAML configuration in Denodo. In this case, this error typically means the Solution Manager is improperly validating the received SAML message.
However, since such error is observed in regular browser window, here are some possible reasons and checks to be performed:
1. The issue might be related to the cookies and cache stored in the browser since such settings might affect the SAML authentication and validation process. Try clearing the browser cookies and re-login to the Solution Manager admin tool.
2. Verify if you are using Denodo [supported browsers](https://community.denodo.com/docs/html/browse/8.0/en/platform/installation/preinstallation_tasks/software_requirements/software_requirements#supported-browsers).
3. Login to the Solution manager admin tool using regular browser window while disabling any active browser extension.
4. Alternatively, I would check the Solution Manager logs located in `<SOLUTION_MANAGER_HOME>/logs/solution-manager-web-tool` while performing above mentioned behavior to check for relevant errors.
If the issue persists and you have a valid support account, create a case in [Support Site](https://support.denodo.com/) to further assist in resolving this issue.
Hope this helps !
