When you access SAS Studio and have not yet authenticated, SAS Studio would redirect you to /SASLogon to authenticate. From the URL there it looks like /SASLogon is being appended to the URL repeatedly through subsequent redirects, so this is probably a configuration issue either in the SAS Web Server or SAS Logon.
A Technical Support case would be appropriate to review your configuration.
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Greg Wootton | Principal Systems Technical Support Engineer