The /import command does not function when replying to the backup file

[mmmTelegram]

./lua/groupbutler/utilities.lua:286: attempt to concatenate field 'filepath' (a nil value)

stack traceback:
./lua/groupbutler/utilities.lua:286: in function 'telegram_file_link'
./lua/groupbutler/plugins/backup.lua:136: in function <./lua/groupbutler/plugins/backup.lua:85>
(tail call): ?
[C]: in function 'xpcall'
./lua/groupbutler/main.lua:211: in function 'on_msg_receive'
./lua/groupbutler/main.lua:338: in function 'process'
./polling.lua:61: in function <./polling.lua:46>
[C]: in function 'pcall'
./polling.lua:81: in main chunk
[C]: ?
en_GB
/import