[ERROR: The following has evaluated to null or missing:
==> channel [in template "1/default/inc_header.html" at line 54, column 31]
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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: #assign parent = channel.parent!channel [in template "1/default/inc_header.html" at line 54, column 13]
- Reached through: #include "inc_header.html" [in template "1/default/sys_tag_item.html" at line 14, column 1]
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