我使用shiro标签就报错
严重: 在路径为/4pl-site-cpc的上下文中，Servlet[springmvc]的Servlet.service（）引发了具有根本原因的异常Request processing failed; nested exception is freemarker.core.InvalidReferenceException: The following has evaluated to null or missing:
==> shiro.hasPermission [in template "admin/article/list.ftl" at line 130, column 51]
Tip: If the failing expression is known to be legally null/missing, either specify a default value with 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 parenthessis: (myOptionVar.foo)!myDefault, (myOptionVar.foo)??
The failing instruction (print stack trace for 1 more):
==> @shiro.hasPermission name="admin:review" [in template "admin/article/list.ftl" at line 130, column 49]
FreeMarker template error:
The following has evaluated to null or missing:
==> shiro.hasPermission [in template "admin/article/list.ftl" at line 130, column 51]
Tip: If the failing expression is known to be legally null/missing, either specify a default value with 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 parenthessis: (myOptionVar.foo)!myDefault, (myOptionVar.foo)??
The failing instruction (FTL stack trace):
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==> @shiro.hasPermission name="admin:review" [in template "admin/article/list.ftl" at line 130, column 49]
#list page.content as article [in template "admin/article/list.ftl" at line 97, column 25]
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Java stack trace (for programmers):
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freemarker.core.InvalidReferenceException: [... Exception message was already printed; see it above ...]
求大佬解答！！！
