TypeError: fetch() URL is invalid

[c7v]

http://localhost:8192/spots
response:
Cannot GET /spots

Nothing works, what should I do? When I make a request, I get an error in the terminal and there is nothing on the website other than the information made when receiving the request for the legal entity.

[c7v]

http://[host_where_it_is_running:port]/spots

host_where_it_is_running???? is localhost