For plugin specific problems its best to post the issue on the plugins issues page (shown at the top of the plugin page) or if there isnt one then post it on the plugins page.
If you mean this votifier then its built for sponge api 5 and hasnt been updated since, so it won’t work nor will you get support for it.
There is another votifier plugin for sponge I found with API 7, but the github sourcecode package doesn’t match the one in your error.