pgAdmin4 fatal error - Mailing list pgadmin-support

I wonder if you could help please.

I'm doing an SQL training course and I'm struggling to open pgadmin.

I've been in contact with course provider but they've not been able to resolve my issue despite multiple email exchanges and I wonder if you might be able to help please?

I've downloaded  PostgreSQL (v10.16) from https://www.postgresql.org/download/ and then pgAdmin4 (v 5.1) as advised by the trainer.

However, when I open pgAdmin, I receive this message:

I;ve been advised to update my system settings (.i.e. Path in Environment Variables) to the following but it's not resolved the issue. I'd be most grateful if you could please help. 

Many thanks in advance,

Michaela