WDMyCloudPR4100 can't see the RAID 5 volume

Drive 1 has been red for ages - other 3 raid 5 always. Took out the 3, changed drive 1 to JBOD, now after putting back the other 3 drives on their own all lights red and it is saying I have to set up RAID!!

JBOD drive shows volume_1, which was the volume name for the RAID

Any ideas how to recover this situation?