X-InfluxDB-Error: "invalid character '-' in numeric literal

Hello there, I am trying to get time series data form InfluxDB (1.8.4) using a Flux query from R-Studio. I always get the same error “invalid character ‘-’ in numeric literal”.

Any ideas what might be causing this issue?

dburl <- "http://localhost:8086/api/v2/query"

influxquery <- sprintf(
  'from(bucket: "plcview/autogen")
    |> range(start: 2017-06-27T04:16:58.278Z, stop: 2017-06-27T03:14:48.74Z)
    |> filter(fn: (r) => r._measurement == "MONITORING")
    |> map(fn:(r) => ({ r with _time: uint(v: r._time) }))'
)

my_raw_result <- httr::POST(url=dburl,
                            add_headers('Content-Type: application/vnd.flux',
                                        'Accept: application/csv',
                                        'Accept-Encoding: application/gzip'),
                            body=list(q=influxquery))

str(my_raw_result)

My data looks like this:

time                     MONITORING equipmentNumber workplace
----                     ---------- --------------- ---------
2017-06-27T02:16:58.599Z 1          L4212M1017      3
2017-06-27T02:16:58.6Z   1          L4212M1017      4
2017-06-27T02:16:58.6Z   1          L4212M1017      1
2017-06-27T02:16:58.6Z   1          L4212M1017      2
2017-06-27T02:17:03.14Z  0          L4212M1017      1
2017-06-27T02:17:03.14Z  0          L4212M1017      2
2017-06-27T02:17:03.14Z  0          L4212M1017      4
2017-06-27T02:17:20.007Z 1          L4212M1017      1
2017-06-27T02:17:36.988Z 1          L4212M1017      4
2017-06-27T02:17:36.988Z 1          L4212M1017      2

Thank you!