Crash log here
https://gist.github.com/tgstyle/471e457d5514bbb938e84ec559e5da6f

What makes you think it's MalisisDoors ?

MalisisDoors causes the crash when in the mods folder? It works without sponge.

SpongePowered/SpongeForge#1678

If not there is now an issue open with sponge.

You should post the full log.

Full crash log
https://gist.github.com/tgstyle/acb1ea68c6cd85a57f422d70735b4acc

Full server log
https://gist.github.com/tgstyle/6abd7a3bfd0911dc359f69a92ef74c05

SpongePowered/SpongeForge#1672

In 1672 TekuSP mentioned -
"Okay, Looks like MalisisDoor is for unknown reasons registering vanilla minecraft doors as doors without name, texture and that small texture. I recommend catching this issue in Sponge, but looks like bug of MalisisDoors."

Unfortunately I am seeing the same error.

Should be fixed in the latest update.