R Studio Desktop multi user system freezing user sessions

Good Morning,

I have three users using R Studio Desktop, they are using different files , but for some reason their sessions lock up. If two users open r studio one of their sessions will stall. Their files taken a long time to load and the sessions always cuts off one users where they need to End Process and start over. Myself and our Senior comp specialist haven scratching our heads. I should mention the system has no internet access.