Probleme mit der Validator Ausgabe

[tempest]

hi!

Ich verstehe etwas beim w3c validator nicht (weil ich dort keine erklärungen finde)

ich hoffe ihr könnt mir helfen:

Below are the results of attempting to parse this document with an SGML parser.

Line 13, column 117: document type does not allow element "div" here; missing one of "object", "ins", "del", "map", "button" start-tag
  ...); border: 1px dashed; padding: 1em;">
                                          ^
Line 45, column 15: document type does not allow element "ul" here; missing one of "object", "ins", "del", "map", "button" start-tag
              <ul>
                 ^
Line 55, column 17: document type does not allow element "hr" here; missing one of "object", "ins", "del", "map", "button" start-tag
              <hr />
                   ^

Was habe ich falsch gemacht?