Submitted by Musaka, also found by Jorgect, HE1M, pep7siup, Brenzee, kutugu, and Bughunter101
If ProtocolRewardsPool is insufficient in EUSD, but has enough PeUSD to give rewards, it still reverts due to wrong if() statement, thus it is  unable to send the rewards to users.
Users have just emptied ProtocolRewardsPool out of EUSD, by claiming rewards with  getReward. Now the protocol has a new distribution of PeUSD tokens, with LybraConfigurator.distributeRewards, but when users try to claim their rewards, getReward reverts because of this:
Because of the constant revert, users are not able to claim their rewards and need to wait for EUSD distribution. The other bad thing is that the PeUSD is un-calimable to most extent. Again, because of the line bellow, if:
Now PeUSD is un-claimable and remains in the contract.
Manual Review
Update the if as:
Math
0xean (judge) decreased severity to Medium
LybraFinance acknowledged
