theme fallback

[zharbouz086]

Error loading theme
A fallback is used since the configured theme failed to load with the error below.

Unable to compile 'themes/argon
/header' as Lua template:

/usr/lib/lua/luci/ucodebridge.lua:23: /usr/lib/lua/luci/template.lua:158: Failed to load template 'themes/argon
/header'.
Error while parsing template '/usr/lib/lua/luci/view/themes/argon
/header.htm':
No such file or directory

In error(), file [C]
called from function run (/usr/lib/lua/luci/ucodebridge.lua:23)
called from function [anonymous function] (/usr/lib/lua/luci/ucodebridge.lua:31)

In anonymous function, file /usr/share/ucode/luci/runtime.uc, line 106, byte 62:
called from function [anonymous function] (/usr/share/ucode/luci/runtime.uc:158:65)
called from function [anonymous function] (/usr/share/ucode/luci/dispatcher.uc:895:3)
called from anonymous function (/www/cgi-bin/luci:39:13)

vm.get('_G', 'luci', 'ucodebridge', 'compile').call(path);
Near here ------------------------------------------------------------------^