Where can I find support for Fooman Same Order Invoice Number (M2)?

Check out these resources to get the extension running:

Check out the FAQ in this Help Centre
Or report a suspected bug. Before reporting a bug, please make sure that you can replicate the issue on Magento's default theme (with no other extensions installed), to rule out any issues caused by extension/theme conflicts). We may contact you if we have an immediate fix or a workaround, but we can't always respond individually to every report that comes in.

This usually solves 95% of issues we receive. If an error still persists after following the troubleshooting advice above: