Update first login troubleshooting step

Author: scherroman

pages/access/login-troubleshooting.mdx

@@ -9,9 +9,11 @@ import { Steps } from "nextra/components";
 If you're having trouble logging in to Oneleet, try following the steps below:
 
 <Steps>
-### 1. Try a fresh browser tab
+### 1. Close all Oneleet tabs and start in a fresh browser tab
 
-Close your current tab, open a fresh tab, then try logging in again.
+First, close every browser tab that you currently have open for Oneleet across all windows. Then, open a single new browser tab and try logging in again.
+
+> Having multiple Oneleet login pages open at once can cause session mismatches and prevent a successful login.
 
 ### 2. Clear your cookies and site data