I can no longer access confluence after upgrade from 6.15 to 7.48

[AHRQ]

I am getting this error during login: 

http://localhost:8090/login.action?os_destination=%2Findex.action&permissionViolation=true

[Gonchik Tsymzhitov]

Hi @AHRQ ,

Please, set recovery admin pass, 

https://confluence.atlassian.com/doc/restore-passwords-to-recover-admin-user-rights-158390.html

then you can check is this problem with AD/LDAP connection or not. 

Also, I do recommend to check the logs to find out some ERROR

[AHRQ]

Thanks for your response.  I can't even get the login page to show up.  which log I should look at?  Thanks!

This page can’t be displayed

• Make sure the web address http://localhost:8090 is correct.
• Look for the page with your search engine.
• Refresh the page in a few minutes.

[Gonchik Tsymzhitov]

@AHRQ 

1. Please, take a look the catalina.out log

2. Then check atlassian-confluence.log

https://confluence.atlassian.com/doc/working-with-confluence-logs-108364721.html