Error with powerline step

Error with the scrpt at the "powerline" step:

Install powerline fonts? [y/n] (default: y)
y

mmmm m m "
#" " mmm mm#mm mm#mm mmm m mm mmmm m m mmmm
"#mmm #" # # # # #" # #" "# # # #" "#
"# #"""" # # # # # # # # # # #
"mmm#" "#mm" "mm "mm mm#mm # # "#m"# "mm"# ##m#"
m # #
"" "

                                ""#      "                           m"" 

mmmm mmm m m mmm m mm # mmm m mm mmm mm#mm
#" "# #" "# "m m m" #" # #" " # # #" # #" # #

# # # #m#m# #"""" # # # # # #""""

##m#" "#m#" # # "#mm" # "mm mm#mm # # "#mm" #

"

             m                                                           

mmm m mm mm#mm mmm
#" "# #" # # # "

# # # # """m

"#m#" # # "mm "mmm"

/home/mehdi/git/linux-setup/appconfig/fonts-powerline/install.sh: line 44: ./install.sh: No such file or directory
/home/mehdi/git/linux-setup/appconfig/fonts-powerline/install.sh: "./install.sh" command failed with exit code 127
./install.sh: "bash $APPCONFIG_PATH/fonts-powerline/install.sh $subinstall_params" command failed with exit code 127