06:49:22: WARNING: Undeclared global variable "IsPlayerNodeOwner" accessed at /home/minetest/.minetest/mods/pipeworks/init.lua:64
06:49:22: WARNING: Undeclared global variable "isprotect" accessed at /home/minetest/.minetest/mods/pipeworks/init.lua:77

06:49:22: ERROR[main]: ERROR: An unhandled exception occurred: /opt/minetest-0.4.12/bin/../builtin/game/misc.lua:34: bad argument #1 to 'get_player_privs' (string expected, got userdata)
06:49:22: ERROR[main]: stack traceback:
06:49:22: ERROR[main]:  [C]: in function 'get_player_privs'
06:49:22: ERROR[main]:  /opt/minetest-0.4.12/bin/../builtin/game/misc.lua:34: in function 'check_player_privs'
06:49:22: ERROR[main]:  /home/minetest/.minetest/mods/protector/init.lua:95: in function 'can_dig'
06:49:22: ERROR[main]:  /home/minetest/.minetest/mods/pipeworks/init.lua:82: in function 'node_is_owned'
06:49:22: ERROR[main]:  /home/minetest/.minetest/mods/pipeworks/devices.lua:291: in function </home/minetest/.minetest/mods/pipeworks/devices.lua:290>