Error : cannot read property 'title' of undefined

Hello everybody, I can’t seem to figure out why I get this error - “Cannot read property ‘title’ of undefined”.

Any help is appreciated!

What is the Metrics ?

The metrics is something like that :

i get the data from Gatling Frontline

and also i created variables (requests, simulation,… )

Did you try not giving spaces in any keyword? like names variables this error never occurred to me
eg response Ok --> response_ok