Of particular interest is the licenses for the "skyblock" and "skyblock_levels" mods.
EDIT: Additionally, trying to get this running locally:
When running in new world, shows up at location set by 'static_spawnpoint', falls onto the floor, dies, then is teleported to (16032,16,16032), and hangs. The location (16032,16,16032) is outside of the map, the size of which is initially set at 1000x1000. The code is running skyblock.spawn_player() in [minetest location]/worlds/[game name]/mods/skyblock/skyblock.lua, getting to the IF statement on line 155 and perpetually entering that code block and being returned out. The variable 'spawn' is set to the previously-mentioned location outside of the map. Attempts to teleport out of this area result in being teleported back to that out-of-map area, even if teleporting to and loading an area in ~/.minetest/worlds/[world]/skyblock.start_positions.
Stopping the server and then re-entering the server result in same issue. If engaging fly privs before hitting the ground to die, then the map loads the kill-ground (presumably) normally wherever I fly. Then disabling fly privs in order to have a spawn created ends up in dying and engaging the off-map stuck-loop problem again.
debug.txt output:
Spoiler
2016-06-28 03:10:37: ACTION[Main]: [TimeRegulation] Loop started
2016-06-28 03:10:37: ACTION[Main]: [TimeRegulation] Thank you for using TimeRegulation v00.01.10 by Mg/LeMagnesium
2016-06-28 03:10:37: ACTION[Main]: [TimeRegulation] Status: 2
2016-06-28 03:10:37: ACTION[Main]: [TimeRegulation] Absolute Time Speed: 0.00024914408356534
2016-06-28 03:10:37: ACTION[Main]: [TimeRegulation] Duration: 5779788.0623657
2016-06-28 03:10:37: ACTION[Main]: [TimeRegulation] Loop interval: 9623347.1238389s
2016-06-28 03:10:37: ACTION[Main]: [TimeRegulation] Ratio:
2016-06-28 03:10:37: ACTION[Main]: [TimeRegulation] Day: 66.7%
2016-06-28 03:10:37: ACTION[Main]: [TimeRegulation] Night: 33.3%
2016-06-28 03:10:37: ACTION[Main]: [TimeRegulation] Applied time speeds:
2016-06-28 03:10:37: ACTION[Main]: [TimeRegulation] Day: 0.00018676468033384
2016-06-28 03:10:37: ACTION[Main]: [TimeRegulation] Night: 0.00037409021556357
2016-06-28 03:10:37: ACTION[Main]: [Ignore] This session is loaded with the ignore callback
2016-06-28 03:10:37: ACTION[Main]: __ __ __ __
2016-06-28 03:10:37: ACTION[Main]: _____/ /____ __/ /_ / /___ _____/ /__
2016-06-28 03:10:37: ACTION[Main]: / ___/ //_/ / / / __ \/ / __ \/ ___/ //_/
2016-06-28 03:10:37: ACTION[Main]: (__ ) ,< / /_/ / /_/ / / /_/ / /__/ ,<
2016-06-28 03:10:37: ACTION[Main]: /____/_/|_|\__, /_.___/_/\____/\___/_/|_|
2016-06-28 03:10:37: ACTION[Main]: /____/
2016-06-28 03:10:37: ACTION[Main]: [skyblock] read start positions
2016-06-28 03:10:40: WARNING[Main]: Field "light_propagates": Deprecated; determined from paramtype
2016-06-28 03:10:40: WARNING[Main]: Field "light_propagates": Deprecated; determined from paramtype
2016-06-28 03:10:40: WARNING[Main]: Field "light_propagates": Deprecated; determined from paramtype
2016-06-28 03:10:40: WARNING[Main]: Field "light_propagates": Deprecated; determined from paramtype
2016-06-28 03:10:40: WARNING[Main]: Field "light_propagates": Deprecated; determined from paramtype
2016-06-28 03:10:40: ACTION[Main]: [skyblock] [MOD]skyblock -- loaded from /usr/local/share/minetest-master/bin/../games/server-minetestforfun-skyblock/mods/skyblock
2016-06-28 03:10:40: ACTION[Main]: signs loaded
2016-06-28 03:10:40: WARNING[Main]: Field "light_propagates": Deprecated; determined from paramtype
2016-06-28 03:10:40: ACTION[Main]: [skyblock] [MOD]skyblock_levels -- loaded from /usr/local/share/minetest-master/bin/../games/server-minetestforfun-skyblock/mods/skyblock_levels
2016-06-28 03:10:40: ACTION[Main]: [u_skins] Loaded 10 normal skins
2016-06-28 03:10:40: ACTION[Main]: [u_skins] Loaded 3 mff custom skins
2016-06-28 03:10:40: WARNING[Main]: Undeclared global variable "HUD_ENABLE_HUNGER" accessed at ...ames/server-minetestforfun-skyblock/mods/hud/builtin.lua:41
2016-06-28 03:10:40: ACTION[Main]: [ACTimers] Loaded
2016-06-28 03:10:40: ACTION[Main]: [pvpbutton] Using UnifiedInventory (u_inv) as inventory management mod
2016-06-28 03:10:40: WARNING[Main]: Field "maxwear" is deprecated; replace with uses=1/maxwear
2016-06-28 03:10:40: WARNING[Main]: Field "maxwear" is deprecated; replace with uses=1/maxwear
2016-06-28 03:10:40: WARNING[Main]: Field "maxwear" is deprecated; replace with uses=1/maxwear
2016-06-28 03:10:40: ACTION[Main]: .__ __ __
2016-06-28 03:10:40: ACTION[Main]: _____ |__| ____ _____/ |_ ____ _______/ |_
2016-06-28 03:10:40: ACTION[Main]: / \| |/ \_/ __ \ __\/ __ \ / ___/\ __\
2016-06-28 03:10:40: ACTION[Main]: | Y Y \ | | \ ___/| | \ ___/ \___ \ | |
2016-06-28 03:10:40: ACTION[Main]: |__|_| /__|___| /\___ >__| \___ >____ > |__|
2016-06-28 03:10:40: ACTION[Main]: \/ \/ \/ \/ \/
2016-06-28 03:10:40: ACTION[Main]: World at [/home/matt/.minetest/worlds/Skyblock]
2016-06-28 03:10:40: ACTION[Main]: Server for gameid="server-minetestforfun-skyblock" listening on 0.0.0.0:57888.
2016-06-28 03:10:40: ACTION[Server]: [automappercolors] nodes dumped
2016-06-28 03:10:40: ACTION[Server]: [TimeRegulation] Entering day period : time_speed 0.00018676468033384
2016-06-28 03:10:41: WARNING[Main]: Irrlicht: PNG warning: iCCP: known incorrect sRGB profile
2016-06-28 03:10:41: WARNING[Main]: Irrlicht: PNG warning: iCCP: known incorrect sRGB profile
2016-06-28 03:10:41: WARNING[Main]: Irrlicht: PNG warning: iCCP: known incorrect sRGB profile
2016-06-28 03:10:41: WARNING[Main]: Irrlicht: PNG warning: iCCP: known incorrect sRGB profile
2016-06-28 03:10:41: WARNING[Main]: Irrlicht: PNG warning: iCCP: known incorrect sRGB profile
2016-06-28 03:10:41: WARNING[Main]: Irrlicht: PNG warning: iCCP: known incorrect sRGB profile
2016-06-28 03:10:41: WARNING[Main]: Irrlicht: PNG warning: iCCP: known incorrect sRGB profile
2016-06-28 03:10:41: WARNING[Main]: Irrlicht: PNG warning: iCCP: known incorrect sRGB profile
2016-06-28 03:10:41: WARNING[Main]: Irrlicht: PNG warning: iCCP: known incorrect sRGB profile
2016-06-28 03:10:41: WARNING[Main]: Irrlicht: PNG warning: iCCP: known incorrect sRGB profile
2016-06-28 03:10:41: WARNING[Main]: Irrlicht: PNG warning: iCCP: known incorrect sRGB profile
2016-06-28 03:10:41: WARNING[Main]: Irrlicht: PNG warning: iCCP: known incorrect sRGB profile
2016-06-28 03:10:41: WARNING[Main]: Irrlicht: PNG warning: iCCP: known incorrect sRGB profile
2016-06-28 03:10:41: WARNING[Main]: Irrlicht: PNG warning: iCCP: known incorrect sRGB profile
2016-06-28 03:10:42: ACTION[Server]: Respawn position for player "singleplayer" outside limits, resetting
2016-06-28 03:10:42: ACTION[Server]: singleplayer [127.0.0.1] joins game.
2016-06-28 03:10:42: ACTION[Server]: singleplayer joins game. List of players: singleplayer
2016-06-28 03:10:44: ACTION[Server]: [skyblock] get_spawn() for singleplayer is unknown
2016-06-28 03:10:44: ACTION[Server]: [skyblock] skyblock.spawn_player() singleplayer
2016-06-28 03:10:44: ACTION[Server]: [skyblock] get_spawn() for singleplayer is unknown
2016-06-28 03:10:44: ACTION[Server]: [skyblock] get_next_spawn()
In that IF statement now. Variable 'spawn' has value of x=16000 y=-2 z=16064
2016-06-28 03:10:46: ACTION[Main]: [Ignore] Queues flushed
>>Quit<<