Experience Site login page loads when administrator accesses the ‘Experience Workspace’

If the scenario is occurring, the following may be true regarding Experience Site Login Session Settings:

• For the affected profile the following settings is likely enabled: Separate Experience Cloud site and Salesforce login authentication for employees.
• The site you are unable to log into after accessing Workspaces has the following login preference disabled: Allow employees to log in directly to an Experience Cloud site.  
• The Disable Lock sessions to the IP address from which they originated may need to be adjusted.
• The Enforce login IP ranges on every request may need to be adjusted.
• The Lock sessions to the domain in which they were first used may need to be adjusted.

Steps To Resolve 

Option 1: Disable Separate Experience Cloud site and Salesforce login authentication for employees and establish a new login session. The steps for this are:
 

1. Navigate to: 
   • Salesforce Classic: Setup | Manage Users | Profiles
   • Lightning Experience:  Setup | Users | Profiles
2. If you are using the Standard Profile User Interface, locate your profile and click Edit. If you are using the Enhanced Profile User Interface click on the Profile name.
3. For the Standard Profile User Interface scroll down and locate Session Settings, set "Separate Experience Cloud site and Salesforce login authentication for employees" to false.
4. Save.
5. For the Enhanced Profile User Interface select Session Settings under System.
6. Click Edit and then set Separate Experience Cloud site and Salesforce login authentication for employees to false.
7. Save.
8. Log out of Salesforce and log back in to establish a new login session.
9. You can now access Workspaces normally without the need of a second login to the site.

1. Follow the above steps to disable "Separate Experience Cloud site and Salesforce login authentication for employees" (This is required in order to access the needed settings).
2. Once you have established a new login session you should now have access to Workspaces.
3. Go to:
   • Salesforce Classic: Setup | Digital Experiences | All Sites | Workspaces (for the affected site you need access to)
   • Lightning Experience: Gear icon | Setup | Digital Experiences | All Sites | Workspaces (for the affected site you need access to)
4. Select Administration | Login & Registration
5. Set Allow employees to log in directly to an Experience Cloud site to True.
6. Save.
7. Re-enable Separate Experience Cloud site and Salesforce login authentication for employees
8. You should now be able to log into the community when presented with the login page after clicking Workspaces. 

Option 3: Disable the following Session Settings: Lock sessions to the IP address from which they originated, Lock sessions to the domain in which they were first used, Enforce login IP ranges on every request. The steps for this are:

1. Navigate to: 
   • Salesforce Classic: Setup | Security Controls | Session Settings
   • Lightning Experience:  Setup | Session Settings
2. Uncheck:
   • Lock sessions to the IP address from which they originated
   • Lock sessions to the domain in which they were first used
   • Enforce login IP ranges on every request
3. Save.

Please note: These settings are only available in Enterprise, Performance, Unlimited and Developer Editions organizations. If your organization is not among these, then you will not have access to this setting.