After complete reinstallation of the plugin, as well as the databases, it now works perfectly with all versions (at least on my side, no problems found). The only thing I could blame this plugin for is the fact that we can't change the command /aacbc notify and the messages displayed, which is a shame when a Frenchman uses the plugin;) ! Also, the second small reproach is that you can't modify the plugin prefix"[AACBungeeConnect] AACBungeeConnect: 1.5.3 by Nojo Noah" or even simply disable the command to normal players without having to go through another plugin to do it.
I think, at least, that when you pay for a plugin, you should have this possibility, even if for the quality, it is not expensive!
Otherwise, this plugin is perfect, and I highly recommend it to you.
Some pictures ;) ! :
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