Gatling build history was corrupted after upgrading to 2.178. 

All previous builds lost the gatling reports and dates changed to DEC 31, 1969. Tried the steps suggested here, but it didn't correct the issue. https://support.cloudbees.com/hc/en-us/articles/218434707-Job-builds-timestamps-have-changed-to-DEC-31-1969

All Gatling jobs failed on 2.178 and provided no gatling report. We've since rolled back to 2.174 and have had no issues.