Hi,
which version are you using? (1.0.8 beta 5?)
I already know about this problem,
it happens, when loading a new xml file at the beginning, and a plugin (without keep) from
the first xml should be removed,
the problem was - the loading of this plugin itself was not finished, and this causes this error,
I have already fixed this problem, but I'm not sure if it was in the beta 5 or in the next beta 6?
so if it's not working with the beta 5, please wait for the next version
best regards,
Klaus