At end of wave 4, after clearing all attackers, nothing happens.
There was a portal still up but nothing came out of it for several minutes and we ran around the entire map spamming AoE attacks in case there was a reluctant or invisible attacker lurking about. There was nothing to do but abandon the scenario and get nothing for it.
What went wrong?
Same here, we are stuck after defeating Wave 10 and hope someone will answer our petitions. Would suck to have to leave without any rewards…
UPDATE: We were rescued by the wonderful Nirvelle! Thank you again!