Many thanks to apmuthu and cambell for your help, time and suggestions.

Temporary disabled mod-security this cured the problem...!!!!

I now have something to give to hosting techs....

Will let you know how this ends.

Do you have a .htaccess somewhere in the tree / or /apmuthu or /apmuthu/sales?

Do you or your host have a misconfigured location or directory directive in your apache config.

Does your host use mod-security or something similar?

I can't be sure without actually investigating your server, but I think this is a server configuration issue.

Just to eliminate this I rolled back to 2.3.15 and still it has the same problem

I confirm that the mysql user had full permissions, I have noticed that turning java off in the browser allows the restore function to work.

I'm a bit confused by this one, (i think...) To run win xp would require me to set up a VM and I do not have a copy of SP3 (or even XP..I have to look) .. How does this help the diagnosis? The same issue is seen on multiple pc, win 7, 8 & 10. If you could explain the reasoning behind this please.

MySQL version 5.6.33
PHP version 5.6.27

You had accessibility problems? Do have this intermittently as is shared hosted, but not had recently.

Updated mysql with above values, no change in problem.

Try to make the following changes to your sql and see if on a fresh login the problem persists:

UPDATE `cafcolom_apmu`.`0_users` SET `language`='C' WHERE `id`='1';
UPDATE `cafcolom_apmu`.`0_sys_prefs` SET `value`='3600' WHERE `name`='login_tout';
INSERT INTO `cafcolom_apmu`.`0_sys_prefs`(`name`,`category`,`type`,`length`,`value`) VALUES ( 'default_quote_valid_days','glsetup.sales','smallint','6','30'); 

-- Check the 0_security_roles table's records

Can confirm your yellow triangle on Ajax change of customer in new direct invoice in WinXPSP3 / FF 37.0.2. This is specific to your install and you would need to access your apache error log and php error log in FA to see what gives.

Even changing to the current fiscal year and attempting the above results in the same error.

What is the version of PHP / MySQL you are using?

login
apmuthu

password
12345678

I confirm I used FA git master code. The previous installations I have used softaculous apps installer.

The problem still occurs in the FA git master code as you will see.

Hope you can diagnose this for me.

Hope you are using the FA git master code.

I still think its something serverside, but finding it very hard to diagnose as shared hosting.

Apmuthu, any more details on apache config?

Could it be anything in php.ini?

Yes the session timed out after approx 10 secs...which corresponds with js/utils line I think its 39 =10000.

I am not redirected to login, please read 1st post...the installation has been running perfectly since march, so seems unlikely to be installation + I have done done 2 clean installations with v2.3.25 and have exactly the same issue.

Ctrl-R just takes the page back to original custom (1st customer in list). The part I find strange is that i can add/ change in items & inventory

Try Ctrl-R to reload the page and see if it comes right from there.