[Question][PGAgent][Jobs] - Problems running sh scripts on remote Server

https://stackoverflow.com/questions/52168081/systemd-unit-for-pgagent 

My job is a sh script that makes the daily backups. I test the script and run as expected on a remote server but when configure the job in PgAdmin Win10 Client using in the Code box /pathtoscript/script.sh isn´t working when I click on Run Now.

I try to put:

sh /pathtoscript/script.sh - Don't do anything to the folder of backups

/pathtoscript/script.sh - Don't do anything to the folder of backups

Checking  the /var/log/pgagent_13.log I see that pgagent establish the connection and Execute the job:

Wed Feb 3 10:04:00 2021 DEBUG: Creating DB connection: user=postgres  hostaddr=127.0.0.1 port=5432 dbname=postgres

Wed Feb 3 10:04:00 2021 DEBUG: Parsing connection information...
Wed Feb 3 10:04:00 2021 DEBUG: Allocating new connection for the database with connection string: user=postgres dbname=postgres hostaddr=127.0.0.1 port=5432...
Wed Feb 3 10:04:00 2021 DEBUG: Starting job: 1
Wed Feb 3 10:04:00 2021 DEBUG: Executing batch step1(part of job 1)
Wed Feb 3 10:04:00 2021 DEBUG: Creating primary connection
Wed Feb 3 10:04:00 2021 DEBUG: Parsing connection information...
Wed Feb 3 10:04:00 2021 DEBUG: user: postgres
Wed Feb 3 10:04:00 2021 DEBUG: dbname: postgres
Wed Feb 3 10:04:00 2021 DEBUG: hostaddr: 127.0.0.1
Wed Feb 3 10:04:00 2021 DEBUG: port: 5432
Wed Feb 3 10:04:00 2021 DEBUG: Creating DB connection: user=postgres  hostaddr=127.0.0.1 port=5432 dbname=postgres
Wed Feb 3 10:04:00 2021 DEBUG: Database sanity check
Wed Feb 3 10:04:00 2021 DEBUG: Clearing zombies
Wed Feb 3 10:04:00 2021 DEBUG: Checking for jobs to run
Wed Feb 3 10:04:00 2021 DEBUG: Sleeping...

My question this can be a read/write permissions on destination folder to the user pgagent?

Thank you for your time and I'm sorry if I'm asking a silly question.