I have an error, how can I fix it?
[error] 2753646#0: 5 failed to run log_by_lua: log_by_lua(nginx_log.lua:1853):894: bad argument #1 to 'match' (string expected, got table)
stack traceback:
[C]: in function 'match'
log_by_lua(nginx_log.lua:1853):894: in function 'match_spider'
log_by_lua(nginx_log.lua:1853):1729: in function 'cache_logs'