SQL In Place Upgrade from SQL 2008 to SQL 2014

I had SQL 2008 Server. I did In-Place upgrade to SQL 2014. All the user DBs were in Read-Only mode. After upgrading I see all the DBs are in "Recovery-Pending" mode. I saw the following error msg:

2018-12-07 08:31:05.070 spid19s      Converting database 'XXX' from version 655 to the current version 782.
2018-12-07 08:31:05.070 spid19s      Error: 928, Severity: 20, State: 1.
2018-12-07 08:31:05.070 spid19s      During upgrade, database raised exception 3415, severity 16, state 1, address 00007FFE038AD7D2. Use the exception number to determine the cause.
2018-12-07 08:31:05.080 spid19s      Error: 3415, Severity: 16, State: 1.
2018-12-07 08:31:05.080 spid19s      Database 'XXX' cannot be upgraded because it is read-only, has read-only files or the user does not have permissions to modify some of the files. Make the database or files writeable, and rerun recovery.

How to fix this issue? I don't have any good backup. Any help would be highly appreciated. 

Thanks