Wanted to avoid triple posting, but can’t seem to edit.
I have found the problem and managed to get the migration to work. Within the Kunena3.php file, there is a single line with a hardcoded jos_ prefix in it. I changed that to my dbs table prefix and the issue was solved.
Just an update on this…
In an attempt to solve the situation, I took my site offline and changed the prefix of kunena_topics to jos_ and figured that might be a work around. As it happened, instead I just got the error stating WordPress database error: [Table ‘******.j25_kunena_topics’ doesn’t exist]
So when I run it normally to use the j25_ prefix, it fails and looks for jos_, and when I change the table to jos_, it then fails and asks for j25_
