[Bug]: NPE for theme when accessing index page

[jobannon]

What happened?

Observed, but reproduction steps still not determined.

Technical cause:
theme is null if we can't figure out what tenant and/or application you belong to

A FreeMarker exception occurred.

Exception:
FreeMarker template error:
The following has evaluated to null or missing:
==> theme  [in template "templates/index.ftl" at line 14, column 11]

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Tip: If the failing expression is known to legally refer to something that's sometimes null or missing, either specify a default value like myOptionalVar!myDefault, or use [#if myOptionalVar??]when-present[#else]when-missing[/#if]. (These only cover the last step of the expression; to cover the whole expression, use parenthesis: (myOptionalVar.foo)!myDefault, (myOptionalVar.foo)??
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FTL stack trace ("~" means nesting-related):
	- Failed at: #if theme.type != "simple"  [in template "templates/index.ftl" at line 14, column 6]
	~ Reached through: #nested  [in template "templates/_helpers.ftl" in macro "body" at line 142, column 7]
	~ Reached through: @helpers.body  [in template "templates/index.ftl" at line 9, column 3]
	~ Reached through: #nested  [in template "templates/_helpers.ftl" in macro "html" at line 33, column 3]
	~ Reached through: @helpers.html  [in template "templates/index.ftl" at line 7, column 1]

Version

1.61.2 and 1.62.1 (two different customers)

Affects Versions

No response

Alternatives / Workarounds

No response