Mojang will drop support for Java versions below 16 with the next release of 1.17.
All my plugins will be updated till this day to be compatible with java 16. Some of them are already compatible.
On the release day of MC 1.17 I will compile all my plugins with java 16 and drop any support for older java versions. Stop being stuck on ancient java versions.

This patch makes BDO ready to be used with java 16. Also please make sure to install the Nashorn js provider when using java 15 and above.
It also fixed a bug with serialization in some cases.
If you encountered errors like: Could not change serialized name. possible config corruption.
Please make sure to open your config once and replace {plugin} with bigdoorsopener.