Afer running the command 'bundle exec rake postgresql_backup:dump' it throws me the following error:

I'm quite new to rails and still am exploring, I'd appreciate it greatly if anyone can help me with this error.
Note: I'm currently using ruby 2.6.10 with rails 6.0.6 so I installed the 0.0.6 version of the gem
Afer running the command 'bundle exec rake postgresql_backup:dump' it throws me the following error:
I'm quite new to rails and still am exploring, I'd appreciate it greatly if anyone can help me with this error.
Note: I'm currently using ruby 2.6.10 with rails 6.0.6 so I installed the 0.0.6 version of the gem