PassionVente on "[Plugin: Wordfence Security] The key used to start a scan expired. The value is"

Hi!

I have the same issue: Wordfence has been running for months without any problem and suddenly I get the error message "[Apr 05 13:08:34] Scan Engine Error: The key used to start a scan expired. The value is: 142....877 and split is: 142....877,1fa3...............5fd4 and time is: 1428232114".

Could you help me solve this issue?

Thanks a lot.

Cheers

Claude