Error: InvalidQuery Query string malformed close to position 6249 about osrm HOT 10 CLOSED

structure(list(PLZ = NA, Stadt = "Erstfeld", Breite = 46.81236378, 
    Laenge = 8.599465297), class = "data.frame", row.names = c(NA, 
-1L))

library(osrm)
library(sf)
res_isochrones <- 50
breaks_isochrones <- seq(90, 120, 30)
path <- paste0(getwd(), "/rawdata/")
map_name = "switzerland-latest"
osrm_path = "C:/OSRM_API5"
filename <- paste0(path, "LagerErstfeld.csv")
datenLager <- read.csv(filename, sep = ";", stringsAsFactors = FALSE)
r <- calculate_isochones(names = datenLager$PLZ, lats = datenLager$Breite[1], 
                         lngs = datenLager$Laenge[1],
                         breaks = breaks_isochrones, 
                         res = res_isochrones, 
                         map_name = map_name,
                         osrm_path = osrm_path) 

calculate_isochones <- function(names, lats, lngs, breaks = seq(5,20,5), res = 50, 
                                map_name, osrm_path) {
  options(osrm.server = paste0(osrmr:::server_address(TRUE), "/"), osrm.profile = "driving")
  osrmr::run_server(paste0(map_name, ".osrm"), osrm_path)
  parameters <- list(Names = names, 
                     Lattitudes = lats, 
                     Longitudes = lngs,
                     Breaks = breaks, 
                     Resolution = res)
  isochrone_list <- list()
  for (i in 1:length(lats)) {
    isochrone_list[[i]] <- osrm::osrmIsochrone(c(lngs[i], lats[i]), breaks, res)
  }
  names(isochrone_list) <- names
  isochrone_list <- list(parameters, isochrone_list)
  osrmr::quit_server()
  return(isochrone_list)
}

isochrone_list[[i]] <- osrm::osrmIsochrone(loc = c(lngs[i], lats[i]),
                                           breaks = breaks, res = res)

The OSRM server returned an error:
Error: InvalidQuery
Query string malformed close to position 6309

8x the same message...

Error in UseMethod("st_as_sf") : 
  no applicable method for 'st_as_sf' applied to an object of class "NULL"

library(osrm)
Data: (c) OpenStreetMap contributors, ODbL 1.0 - http://www.openstreetmap.org/copyright
Routing: OSRM - http://project-osrm.org/
library(sf)
Linking to GEOS 3.6.1, GDAL 2.2.3, PROJ 4.9.3
res <- 50
breaks <- seq(90, 120, 30)
loc <- c(8.599465297, 46.81236378)
iso <- osrmIsochrone(loc = loc, breaks = breaks, 
                     res = res, returnclass = "sf")
plot(st_geometry(iso), col = c("lightblue1", "lightblue3"))
points(loc[1], loc[2], pch = 20, col = "red")

map_name = "switzerland-latest"
osrm_path = "C:/OSRM_API5"
options(osrm.server = paste0(osrmr:::server_address(TRUE), "/"), osrm.profile = "driving")
osrmr::run_server(paste0(map_name, ".osrm"), osrm_path)  # a wrapper for a shell command. See below...
res <- 50
breaks <- seq(90, 120, 30)
loc <- c(8.599465297, 46.81236378)
iso <- osrmIsochrone(loc = loc, breaks = breaks, 
                     res = res, returnclass = "sf")
# The OSRM server returned an error:
# Error: InvalidQuery
# Query string malformed close to position 6285
...
Error in UseMethod("st_as_sf") : 
  no applicable method for 'st_as_sf' applied to an object of class "NULL"

C:\OSRM_API5>osrm-routed switzerland-latest
[info] starting up engines, v5.10.0[0m
[info] Threads: 8[0m
[info] IP address: 0.0.0.0[0m
[info] IP port: 5000[0m
[info] load names from: "switzerland-latest.osrm.names"[0m
[info] set checksum: 384967193[0m
[info] http 1.1 compression handled by zlib version 1.2.8[0m
[info] Listening on: 0.0.0.0:5000[0m
[info] running and waiting for requests[0m