Hi. I have the exact same problem. Did you find a solution for this problem?
Nope, nothing helped. I've tried RStudio, ZAR, some other programms - no result, after that I brought my Raid 5 to the data restore company (one of the reliable here) and they told me that only manual restoring is possible, but it was too much expensive. So I've decided to accept this lesson, format nah these disks and orginized Raid 10, which is much more reliable, faster and easy recoverable. The more complex system you bulid, - the less chances to recover it you get..