[ERROR: For "...(...)" callee: Expected a method or function, but this has evaluated to a string (wrapper: f.t.SimpleScalar):
==> article.publishDate?string  [in template "1/default/inc_seo.html" at line 11, column 150]

----
FTL stack trace ("~" means nesting-related):
	- Failed at: ${article.publishDate?string("yyyy-MM...  [in template "1/default/inc_seo.html" at line 11, column 148]
	- Reached through: #include "inc_seo.html"  [in template "1/default/article.html" at line 13, column 3]
----]

[ERROR: For "...(...)" callee: Expected a method or function, but this has evaluated to a string (wrapper: f.t.SimpleScalar):
==> article.modified?string  [in template "1/default/inc_seo.html" at line 11, column 235]

----
FTL stack trace ("~" means nesting-related):
	- Failed at: ${article.modified?string("yyyy-MM-dd")}  [in template "1/default/inc_seo.html" at line 11, column 233]
	- Reached through: #include "inc_seo.html"  [in template "1/default/article.html" at line 13, column 3]
----]