2023/07/17 04:39:17 [error] 49#49: *20640837 lua entry thread aborted: runtime error: /usr/local/apisix/apisix/core/utils.lua:299: attempt to index upvalue '_ctx' (a nil value)
stack traceback:
coroutine 0:
	/usr/local/apisix/apisix/core/utils.lua: in function 'replace'
	/usr/local/openresty/lualib/resty/core/regex.lua:1003: in function 're_gsub'
	/usr/local/apisix/apisix/core/utils.lua:324: in function 'resolve_var'
	/usr/local/apisix/apisix/plugins/loki-logger.lua:201: in function 'func'
	/usr/local/apisix/apisix/utils/batch-processor.lua:88: in function </usr/local/apisix/apisix/utils/batch-processor.lua:80>, context: ngx.timer, client: 10.192.169.127, server: 0.0.0.0:9080

...
    - config:
        endpoint_addrs:
        - http://loki-loki-distributed-gateway.monitor.svc.cluster.local:80
        include_req_body: true
        include_req_body_expr:
        - - http_response_status
          - ~*
          - "200"
        include_resp_body: true
        include_resp_body_expr:
        - - http_response_status
          - ~*
          - "200"
        log_labels:
          host: $host
          job: apisix
          method: $request_method

apisix version
/usr/local/openresty//luajit/bin/luajit ./apisix/cli/apisix.lua version
3.4.0

uname -a
Linux dev-apisix-95d499896-n4745 5.10.184-175.731.amzn2.x86_64 #1 SMP Tue Jun 27 21:48:55 UTC 2023 x86_64 GNU/Linux

nginx -V
nginx version: openresty/1.21.4.1
built by gcc 10.2.1 20210110 (Debian 10.2.1-6)
built with OpenSSL 1.1.1s  1 Nov 2022
TLS SNI support enabled
configure arguments: --prefix=/usr/local/openresty/nginx --with-cc-opt='-O2 -DAPISIX_BASE_VER=1.21.4.1.8 -DNGX_GRPC_CLI_ENGINE_PATH=/usr/local/openresty/libgrpc_engine.so -DNGX_HTTP_GRPC_CLI_ENGINE_PATH=/usr/local/openresty/libgrpc_engine.so -DNGX_LUA_ABORT_AT_PANIC -I/usr/local/openresty/zlib/include -I/usr/local/openresty/pcre/include -I/usr/local/openresty/openssl111/include' --add-module=../ngx_devel_kit-0.3.1 --add-module=../echo-nginx-module-0.62 --add-module=../xss-nginx-module-0.06 --add-module=../ngx_coolkit-0.2 --add-module=../set-misc-nginx-module-0.33 --add-module=../form-input-nginx-module-0.12 --add-module=../encrypted-session-nginx-module-0.09 --add-module=../srcache-nginx-module-0.32 --add-module=../ngx_lua-0.10.21 --add-module=../ngx_lua_upstream-0.07 --add-module=../headers-more-nginx-module-0.33 --add-module=../array-var-nginx-module-0.05 --add-module=../memc-nginx-module-0.19 --add-module=../redis2-nginx-module-0.15 --add-module=../redis-nginx-module-0.3.9 --add-module=../ngx_stream_lua-0.0.11 --with-ld-opt='-Wl,-rpath,/usr/local/openresty/luajit/lib -Wl,-rpath,/usr/local/openresty/wasmtime-c-api/lib -L/usr/local/openresty/zlib/lib -L/usr/local/openresty/pcre/lib -L/usr/local/openresty/openssl111/lib -Wl,-rpath,/usr/local/openresty/zlib/lib:/usr/local/openresty/pcre/lib:/usr/local/openresty/openssl111/lib' --add-module=/tmp/tmp.kOo9UFlgbS/openresty-1.21.4.1/../mod_dubbo-1.0.2 --add-module=/tmp/tmp.kOo9UFlgbS/openresty-1.21.4.1/../ngx_multi_upstream_module-1.1.1 --add-module=/tmp/tmp.kOo9UFlgbS/openresty-1.21.4.1/../apisix-nginx-module-1.12.0 --add-module=/tmp/tmp.kOo9UFlgbS/openresty-1.21.4.1/../apisix-nginx-module-1.12.0/src/stream --add-module=/tmp/tmp.kOo9UFlgbS/openresty-1.21.4.1/../apisix-nginx-module-1.12.0/src/meta --add-module=/tmp/tmp.kOo9UFlgbS/openresty-1.21.4.1/../wasm-nginx-module-0.6.4 --add-module=/tmp/tmp.kOo9UFlgbS/openresty-1.21.4.1/../lua-var-nginx-module-v0.5.3 --add-module=/tmp/tmp.kOo9UFlgbS/openresty-1.21.4.1/../grpc-client-nginx-module-v0.4.2 --with-poll_module --with-pcre-jit --with-stream --with-stream_ssl_module --with-stream_ssl_preread_module --with-http_v2_module --without-mail_pop3_module --without-mail_imap_module --without-mail_smtp_module --with-http_stub_status_module --with-http_realip_module --with-http_addition_module --with-http_auth_request_module --with-http_secure_link_module --with-http_random_index_module --with-http_gzip_static_module --with-http_sub_module --with-http_dav_module --with-http_flv_module --with-http_mp4_module --with-http_gunzip_module --with-threads --with-compat --with-stream --with-http_ssl_module