This indicates that the version of doodlebug installed does not match the installed version of illustrator. Unfortunately there is very little to be done for this - for some reason the illustrator library needs to be recompiled for every single minor version change. If you are capable with visual studio you can download the source and build the library yourself against the version of illustrator that’s installed. I know this is a massive headache but unfortunately I cannot develop / maintain separate versions of the plug-in for every version of illustrator. You can also look around and try using other versions people have uploaded, like here.