BUG #16731: pgAdmin v4.28 Will not load

The following bug has been logged on the website:

Bug reference:      16731
Logged by:          Shane Brodie
Email address:      shanebrodie@mymts.net
PostgreSQL version: 13.1
Operating system:   Windows 10
Description:

On several machines, all Windows 10, all developer machines (.Net, NodeJS,
etc., etc.), after installing pgAdmin v4.28, the application will not load.
Can access same local PostgreSQL database (v9.x) using Azure Data Studio or
with pgsql without issue.

Changed HKEY_CLASSES_ROOT\.js\ContentType to text/javascript as per googled
solution, but no joy.  Restarted computer (overkill I know but ...), again
no joy.

Removed v4.28, installed version v4.26, now I can continue working. But
...

Regards

Shane Brodie