Update 1.9.5, you may need to clear cache for updated files.
Try the Commands Troubleshooting and Help page if you get stuff with server errors.
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New Block in Minecraft 1.15 java
Bee Spawn Egg
Minecraft Versions Permalinks
If you find yourself using a particular version all the time, you can link directly. There is some crossover between versions, so there will be quirks.