[Roller6] Server admin error

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Content-Type: text/plain; charset="UTF-8"

Hello everyone,

I'm trying to update the configurations to allow upload of more than 2 MB.
When I access the server admin configuration page, I get this error:

24-Apr-2020 17:52:28.831 ERROR [http-nio-8080-exec-9]
freemarker.core.Environment.handleTemplateException:916 - Error executing
FreeMarker template
freemarker.core.InvalidReferenceException: The following has evaluated to
null or missing:
==> struts.getText(valueKey)  [in template "template/simple/select.ftl" at
line 75, column 36]

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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 itemValue = struts.getText(va...  [in template
"template/simple/select.ftl" at line 75, column 15]
- Reached through: @s.iterator value="parameters.list"  [in template
"template/simple/select.ftl" at line 57, column 1]
- Reached through: #include "/${parameters.templateDir}/...  [in template
"template/bootstrap/select.ftl" at line 22, column 1]
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Entire stack trace is here:  https://pastebin.com/4ZH6bp7b

Thank you,
Tommy

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