server crash

[superfloh247]

minetest: latest master as of today
auroratech: latest master as of today

2021-04-17 21:45:42: ERROR[Main]: ServerError: AsyncErr: ServerThread::run Lua: Runtime error from mod 'aurora_tech' in callback item_OnSecondaryUse(): /opt/minetest/bin/../builtin/common/vector.lua:110: attempt to index local 'a' (a nil value)
2021-04-17 21:45:42: ERROR[Main]: stack traceback:
2021-04-17 21:45:42: ERROR[Main]: /opt/minetest/bin/../builtin/common/vector.lua:110: in function 'add'
2021-04-17 21:45:42: ERROR[Main]: ...minetest/bin/../mods/AuroraTech/tools/blink_launcher.lua:120: in function 'trigger_teleport'
2021-04-17 21:45:42: ERROR[Main]: ...minetest/bin/../mods/AuroraTech/tools/blink_launcher.lua:7: in function 'old_cb'
2021-04-17 21:45:42: ERROR[Main]: /opt/minetest/bin/../mods/AuroraTech/api.lua:21: in function </opt/minetest/bin/../mods/AuroraTech/api.lua:20>