We still see the error message at POWtoken website:
Bridge transactions are currently unstable! Check back for further updates.
Is there any info about when the POW bridge will work?
That is impossible by definition, since to this date every announced date for the release of bridge has been false. And it has turned to be false also the announcement of the already working bridge, since as you've noticed it is not working.
The only attitude possible is to wait and see what happens - if it will ever happen.