Re: BUG #16460: Error when executing REFRESH MATERIALIZED VIEW WITH DATA;

On Mon, May 25, 2020 at 03:43:14PM +0000, PG Bug reporting form wrote:
> PostgreSQL was installed using the EDB Mac OS X installer for PostgreSQL
> version 12.3. The pgAdmin 4 version is 4.21.0. The Materialized View was
> created using the Create Materialized View contextual menu and the
> Materialized View was successfully saved. When the command to Refresh
> Materialized View was issued using the contextual menu, the error was
> generated about in about 0.25 sec. and the status code shown is: Failed
> (exit code: 1). PgAdmin 4 was used to refresh 36 other Materialized Views
> without error. This was the only case where an error occurred.

This pretty much sounds like a packaging issue, so you may want to see
with the maintainers of this installer what went wrong.
--
Michael