on_playerReceiveFields(): String too long

[Festus1965]

happen today with older version:

-- from https://github.com/6r1d/atm
[Mod] atm (4b075b1/05.06.2020)

2022-05-07 10:50:50: ERROR[Main]:
ServerError: AsyncErr: Lua: Runtime error from mod 'atm' in callback on_playerReceiveFields(): String too long
stack traceback:
[C]: in function 'chat_send_player'
/home/thomas/minetest/bin/../mods/atm/receive_fields_wt.lua:34: in function 'func'
...mas/minetest/bin/../builtin/profiler/instrumentation.lua:107: in function <...mas/minetest/bin/../builtin/profiler/instrumentation.lua:100>
/home/thomas/minetest/bin/../builtin/game/register.lua:425: in function </home/thomas/minetest/bin/../builtin/game/register.lua:409>

check if can be also in new version,
I use it no ... from mt-mods/