pgAdmin 4 v1.3 fails to load

Hello,

At start up the program window opens & displays “Loading pgAdmin 4 v1.3”.

Case 1:
Sometimes displays error msg:
error loading script /browser/role/module.js Error msg: undefined
or
error loading script /debugger/js/direct Error msg: undefined
and never completes loading

Case 2:
Sometimes does not display any error msg but never completes loading.

Case 3:
If I start the program with ‘Run as Administrator’, sometimes it completes loading OK & works fine,
other times I get Case 2 behaviour.

The debug log has repeated msgs:
[0322/131833:WARNING:resource_bundle.cc(311)] locale_file_path.empty() for locale

OS = Win 7 SP1 64 bit
desktop mode?? I’m running the downloaded executable
Steps required to reproduce the problem: run the pgAdmin 4 v1.3 executable.

I would appreciate any guidance on how to fix this issue.

Kind regards,
Peter Johnson