Error after upgrade from 4.4.1rc1 to 4.4.1

Hi,

I have upgraded my RT and now I get an error immediately after I enter the
login details.

The error from rt.log says:

[78365] [Thu Sep 22 10:48:30 2016] [error]: encountered object ‘1’, but
neither allow_blessed, convert_blessed nor allow_tags settings are enabled
(or TO_JSON/FREEZE method missing) at
/usr/local/lib/perl5/site_perl/JSON.pm line 154.

Stack:
[/usr/local/lib/perl5/site_perl/JSON.pm:154]
[/opt/rt4/sbin/…/lib/RT/Interface/Web.pm:193]
[/opt/rt4/sbin/…/lib/RT/Interface/Web.pm:4396]
[/opt/rt4/share/html/Elements/JavascriptConfig:87]
[/opt/rt4/share/html/Elements/Header:64]
[/opt/rt4/share/html/index.html:4]
[/opt/rt4/sbin/…/lib/RT/Interface/Web.pm:696]
[/opt/rt4/sbin/…/lib/RT/Interface/Web.pm:375]
[/opt/rt4/share/html/autohandler:53]
(/opt/rt4/sbin/…/lib/RT/Interface/Web/Handler.pm:208)

Not sure exactly what is wrong. Could it be something in RT_SiteConfig.pm,
much as it was working well with 4.4.1rc??

Best regards,
Odhiambo WASHINGTON,
Nairobi,KE
+254 7 3200 0004/+254 7 2274 3223
"Oh, the cruft."