After updating Otter to 1.5.4 it appears that my existing plans cannot access the powershell script assets. I have the default raft setup along with an additional file system raft and am unable to call powershell scripts from either raft.
Scripts still appear in the visual editor for adding, but when added give the "Cannot edit this statement; script metadata could not be parsed" error.
Thank you for the report, we are in the process of releasing a hotfix (v1.5.5). It should be released within the hour.