After installing the mod page crashed my forum, I get this syntax error, unexpected '.', Expecting '{'
What mod?
What's the actual error?
Did you restore the backup that you should have made before attempting a mod installation?
If you did not make a backup, tsk... do so next time.
In the mean time, you will have to manually fix the code that broke
Or restore the package backup in /Packages/backups/ (package manager is smarter than you ;)).