Describe the bug
The log contains:
"Could not serialize com.ferreusveritas.dynamictrees.command.HexColorArgument@379f95b0 (class com.ferreusveritas.dynamictrees.command.HexColorArgument) - will not be sent to client!"

The 'latest' log is here: https://pastebin.com/zmTVKdZC

To Reproduce
Honestly, I didn't see anything specific. I was reading the console output on the SMP server and noted the error.

Screenshots
N/A

Rendering Glitches
N/A, but yes, Optifine is installed.

Additional context
Add any other context about the problem here.

Crashes

• Are you running the latest version of Dynamic Trees? Beta 17
• If you are using the DT Biome O' Plenty Add-on do you have the latest version? 2.0.4
• If you are using the DT Thaumcraft Add-on do you have the latest version? N/A

If the above mods are current then please submit a full crash log. The crash log normally contains the names of mods and their versions. Don't be that guy who submitted a crash report without first checking that the versions are current.

Also, do not paste the crash report into the issue body! Use a paste site like Gist or Pastebin.

Mods List
If your crash log does not contain a list of mods or you have no crash log then please provide a full list of the mods you are using complete with mod versions.

Mod list is here: https://pastebin.com/fuyNHGqn

What version of Forge are you running? forge-1.16.5-36.1.32

Thank you.