Webadmin does not load

[asker]

Hello,

i installed MCServer on a RaspberryPi and it works (i can log in to the server), but i can not log in to the webadmin:
i started it from the root diretory:

pi@raspberrypi ~/MCServer $ ./MCServer

This is the log:

[11:00:38] --- Started Log ---
[11:00:38] Creating new server instance...
[11:00:38] Reading server config...
[11:00:38] Starting server...
[11:00:38] Compatible clients: 1.2.4, 1.2.5, 1.3.1, 1.3.2, 1.4.2, 1.4.4, 1.4.5, 1.4.6, 1.4.7, 1.5, 1.5.1, 1.5.2, 1.6.1, 1.6.2, 1.6.3, 1.6.4, 1.7.2, 1.7.4
[11:00:38] Compatible protocol versions 29, 39, 47, 49, 51, 60, 61, 73, 74, 77, 78, 4
[11:00:38] Client IPv4 IPv4: Port 25565 is open for connections
[11:00:38] Client IPv6 IPv6: Cannot create listening socket for port 25565: "97: Address family not supported by protocol"
[11:00:40] WebServer IPv4 IPv4: Port 8080 is open for connections
[11:00:40] Regenerating users.ini, all users will be reset
[11:00:40] Cannot open file "crafting.txt", no crafting recipes will be available!
[11:00:40] Could not open the furnace recipes file "furnace.txt"
[11:00:40] -- Loading Plugins --
[11:00:40] Initialised Core v.14
[11:00:40] Initialized TransAPI v.1
[11:00:40] -- Loaded 3 Plugins --
[11:00:40] Initialize: Cannot read monsters.ini file, monster attributes not available
[11:00:40] World "world": Unknown mob type: slime
[11:00:40] [Physics] WaterSimulator not present or empty in world/world.ini, using the default of "Vanilla".
[11:00:40] [Physics] LavaSimulator not present or empty in world/world.ini, using the default of "Vanilla".
[11:00:40] [Physics] RedstoneSimulator not present or empty in world/world.ini, using the default of "incremental".
[11:00:40] [Generator] BiomeGen value not set in world.ini, using "MultiStepMap".
[11:00:40] [Generator] HeightGen value not set in world.ini, using "Biomal".
[11:00:40] Preparing spawn area in world "world"...
[11:00:41] 396 chunks to load, 0 chunks to generate
[11:00:43] 255 chunks to load, 0 chunks to generate
[11:00:45] 99 chunks to load, 0 chunks to generate
[11:00:46] Lighting spawn area in world "world"...
[11:00:46] 0 chunks remaining to light
[11:00:46] LUA: 6 - cannot open webadmin/template.lua: No such file or directory
[11:00:46] Can't load <webadmin_template> because of an error in file webadmin/template.lua
[11:00:46] Could not load WebAdmin template "webadmin/template.lua", using default template.
[11:00:46] Startup complete, took 8423 ms!

what did i wrong?