What termination message are you getting? My guess would be that it is not getting either of the expected results so it has no valid path.
Also, something to note is that if you're using the same "action" variable on all of those forms then they will overwrite one another's entries.
For example, if you have two parallel tasks and user 1 enters "Reject" then the next day user 2 enters "Verified" the only value you'll see at that point is "Verified."
As far as the variables go,
First, I would choose one to be your "default" path and remove the condition. I think best practice is to always have at least one default so it has somewhere to go no matter what happens with the conditions.
Second, check the variable values in the instance history to see what it is actually storing for your radio buttons. For example, it would fail if it is looking for "Reject" and the value is actually "rejected"
Third, you need another merge gateway before that first parallel. Forms does not like multiple incoming and multiple outgoing sequence flows on one gateway (The error should appear if you validate).
Basically, a gateway should only branch in one direction; multiple in, or multiple out, but never both. If you need to do that, you use one to merge and connect another to split it again.