Error message: The last event in the history buffer is not a command!
Log error message spotted by Isidro when running a command as part of testing the BMTL1 plugin (using HERD v0.4.8), as well as by me when running tests in the last few months:
2023-Dec-21 12:18:38.227.936 GMT herd-server [140554549589760] ERROR | Post-action callback for x0.configure: The last event in the history buffer is not a command!