Not working!

No usable output! How to resolve error message?
$ ./check_pihole_api.sh -h localhost -t
./check_pihole_api.sh: line 57: /usr/local/nagios/libexec/pihole_api_getQuerySources.tmp: Permission denied
./check_pihole_api.sh: line 125: /usr/local/nagios/libexec/pihole_api_getQuerySources.tmp: No such file or directory
TOP HOSTS BY QUERIES |
$ ./check_pihole_api.sh -h localhost -s queries
DNS QUERIES TODAY |Total=

Is there a Guide for Dummies, please?

Thanks.