Error: read ECONNRESET error while using Postman for API calls after change to irule

This one is working without errors:

when CLIENT_ACCEPTED {
  set tcp_start_time [clock clicks -milliseconds]
}
when HTTP_RESPONSE {
  if { ([HTTP::status] starts_with "4") && \
       ([HTTP::header Content-Type] contains "application/json" || \
        [HTTP::header Content-Type] contains "application/xml" || \
        [HTTP::header Content-Type] contains "application/problem+json") } {
    set irule "Irule_Catch_404"
    set http_status [HTTP::status]
    set resp_start_time [clock format [clock seconds] -format "%Y/%m/%d %H:%M:%S"]
    set resp_elapsed_time [expr {[clock clicks -milliseconds] - $tcp_start_time}]
    if { [HTTP::header exists "Content-Length"] } {
      set resp_length [HTTP::header "Content-Length"]
    }
  } else {
    set resp_length 0
  }
  log local0. "$resp_length; $resp_elapsed_time"
}