# Rstudio app works BUT each session begins with a single auth failure that must be ignored **URL:** \ **Category:** Get Help\ **Created:** [January 9, 2020, 12:42am UTC](https://discourse.openondemand.org/t/rstudio-app-works-but-each-session-begins-with-a-single-auth-failure-that-must-be-ignored/660 "2020-01-09T00:42:27Z")\ **Posts on this page:** 1\ **Showing post:** 2

**Author:** ![jeff.ohrstrom](https://sea1.discourse-cdn.com/flex015/user_avatar/discourse.openondemand.org/jeff.ohrstrom/32/136_2.png) [@jeff.ohrstrom](https://discourse.openondemand.org/u/jeff.ohrstrom)\ **Post date:** [January 9, 2020, 9:02pm UTC](https://discourse.openondemand.org/t/rstudio-app-works-but-each-session-begins-with-a-single-auth-failure-that-must-be-ignored/660/2 "2020-01-09T21:02:40Z")

Do you happen to use CAS authentication? If so, this topic below will be helpful, if not the answer. Even if you don’t use CAS, it may be worth looking though this anyhow for information about _how_ these apps use the passwords they’re given. It may give you ideas on how to troubleshoot, what files to look for, html elements to inspect, what API calls in your browser to look at and so on. > [@Jupyter app ask for password first time, works second time](https://discourse.openondemand.org/t/jupyter-app-ask-for-password-first-time-works-second-time/557/1): > > Hi, I am working on adjusting the Jupyter app to our cluster, the app is currently in Sandbox. When I click the button “Connect to Jupyter” it opens a new tab with Jupyter asking for password, if I return and click again it opens Jupyter’s dashboard as it should. I wonder what is the cause of not having Jupyter dashboard displayed from the first click Thank you Let me know if that’s helpful! --- _[View the full topic](https://discourse.openondemand.org/t/rstudio-app-works-but-each-session-begins-with-a-single-auth-failure-that-must-be-ignored/660)._