Can you check the contents of /config/dashboard.config is there a ui-o-matic entry?

Nope, there is not (yet).
My dashboard.config looks as following:

<?xml version="1.0" encoding="utf-8"?>
<dashBoard>

  <section alias="StartupSettingsDashboardSection">
    <areas>
      <area>settings</area>
    </areas>
    <tab caption="Welcome">
      <control showOnce="true" addPanel="true" panelCaption="">
        views/dashboard/settings/settingsdashboardintro.html
      </control>
    </tab>
  </section>

  <section alias="StartupFormsDashboardSection">
    <areas>
      <area>forms</area>
    </areas>
    <tab caption="Install Umbraco Forms">
      <control showOnce="true" addPanel="true" panelCaption="">
        views/dashboard/forms/formsdashboardintro.html
      </control>
    </tab>
  </section>

  <section alias="StartupDeveloperDashboardSection">
    <areas>
      <area>developer</area>
    </areas>
    <tab caption="Get Started">
      <control showOnce="true" addPanel="true" panelCaption="">
        views/dashboard/developer/developerdashboardvideos.html
      </control>
    </tab>
    <tab caption="Examine Management">
      <control>
        views/dashboard/developer/examinemanagement.html
      </control>
    </tab>
  </section>

  <section alias="StartupMediaDashboardSection">
    <areas>
      <area>media</area>
    </areas>
    <tab caption="Content">
      <control showOnce="false" addPanel="false" panelCaption="">
        views/dashboard/media/mediafolderbrowser.html
      </control>
    </tab>

  </section>

  <section alias="StartupDashboardSection">
    <access>
      <deny>translator</deny>
    </access>
    <areas>
      <area>content</area>
    </areas>
    <tab caption="Get Started">
      <access>
        <grant>admin</grant>
      </access>

      <control showOnce="true" addPanel="true" panelCaption="">
        views/dashboard/default/startupdashboardintro.html
      </control>

    </tab>
  </section>

  <section alias="StartupMemberDashboardSection">
    <areas>
      <area>member</area>
    </areas>
    <tab caption="Get Started">
      <control showOnce="true" addPanel="true" panelCaption="">
        views/dashboard/members/membersdashboardvideos.html
      </control>
    </tab>
  </section>

  <section alias="UmbracoModelsBuilder">
    <areas>
      <area>developer</area>
    </areas>
    <tab caption="Models Builder">
      <control>
        /App_Plugins/ModelsBuilder/modelsbuilder.htm
      </control>
    </tab>
  </section>

  <section alias="UmbracoHealthCheck">
    <areas>
      <area>developer</area>
    </areas>
    <tab caption="Health Check">
      <control>
        views/dashboard/developer/healthcheck.html
      </control>
    </tab>
  </section>
  <section alias="RedirectUrlManagement">
    <areas>
      <area>content</area>
    </areas>
    <tab caption="Redirect URL Management">
      <control>
        views/dashboard/developer/redirecturls.html
      </control>
    </tab>
  </section>
</dashBoard>

Awesome, now it shows something. Do I have to add a reference to some kind of CSS file somewhere?

Yeah the package manifest should have the following

{
propertyEditors: [
    {
        alias: "UIOMatic.MultiPicker",
        name: "UIOMatic Multi Picker",
        editor: {
        view: "~/App_Plugins/UIOMatic/backoffice/views/propertyeditors/multipicker.html"
        },
        prevalues: {
            fields: [
                {
                    label: "Type of object",
                    description: "Select the type of object",
                    key: "typeAlias",
                    view: "~/App_Plugins/UIOMatic/backoffice/views/propertyeditors/pickers.type.html"
                },
                {
                    label: "Text template",
                    description: "Enter the text template, ie, '{{FirstName}} {{LastName}}'",
                    key: "textTemplate",
                    view: "requiredfield",
                    validation: [
                        {
                            type: "Required" 
                        }                        
                    ]
                }
            ]
        }

    },
    {
    alias: "UIOMatic.Dropdown",
    name: "UIOMatic Dropdown",
    editor: {
    view: "~/App_Plugins/UIOMatic/backoffice/views/propertyeditors/dropdown.html"
    },
    prevalues: {
        fields: [
            {
                label: "Type of object",
                description: "Select the type of object (reload the page after selecting to populate dropdowns)",
                key: "typeAlias",
                view: "~/App_Plugins/UIOMatic/backoffice/views/propertyeditors/pickers.type.html"
            },
            {
                label: "Value property",
                description: "Property that holds the value you wish to store",
                key: "valueColumn",
                view: "~/App_Plugins/UIOMatic/backoffice/views/propertyeditors/pickers.property.html"

            },
            {
                label: "Text template",
                description: "Enter the text template, ie, '{{FirstName}} {{LastName}}'",
                key: "textTemplate",
                view: "requiredfield",
                validation: [
                    {
                        type: "Required" 
                    }                        
                ]
            },
            {
                label: "Column to sort on",
                description: "Enter the column name to sort on",
                key: "sortColumn",
                view: "~/App_Plugins/UIOMatic/backoffice/views/propertyeditors/pickers.column.html"                      
            },
            {
                label: "Sort order",
                description: "Select the sortorder",
                key: "sortOrder",
                view: "~/App_Plugins/UIOMatic/backoffice/views/propertyeditors/picker.tablesortorder.html"                       
            }
        ]
    }
    }
]
,
javascript: [
    '~/App_Plugins/UIOMatic/backoffice/assets/js/angular-relative-date.js',

    '~/App_Plugins/UIOMatic/backoffice/imports.js',

    '~/App_Plugins/UIOMatic/backoffice/services/utility.service.js',

    '~/App_Plugins/UIOMatic/backoffice/directives/pagination.directive.js',

    '~/App_Plugins/UIOMatic/backoffice/resources/uioMaticObject.resource.js',
    '~/App_Plugins/UIOMatic/backoffice/resources/uioMaticField.resource.js',
    '~/App_Plugins/UIOMatic/backoffice/resources/uioMaticPropertyEditor.resource.js',

    '~/App_Plugins/UIOMatic/backoffice/uiomatic/edit.controller.js',
    '~/App_Plugins/UIOMatic/backoffice/uiomatic/delete.controller.js', 
    '~/App_Plugins/UIOMatic/backoffice/uiomatic/list.controller.js',

    '~/App_Plugins/UIOMatic/backoffice/views/fieldeditors/file.controller.js',
    '~/App_Plugins/UIOMatic/backoffice/views/fieldeditors/datetime.controller.js',
    '~/App_Plugins/UIOMatic/backoffice/views/fieldeditors/dropdown.controller.js',
    '~/App_Plugins/UIOMatic/backoffice/views/fieldeditors/pickers.content.controller.js',
    '~/App_Plugins/UIOMatic/backoffice/views/fieldeditors/pickers.media.controller.js',
    '~/App_Plugins/UIOMatic/backoffice/views/fieldeditors/pickers.member.controller.js',
    '~/App_Plugins/UIOMatic/backoffice/views/fieldeditors/pickers.user.controller.js',
    '~/App_Plugins/UIOMatic/backoffice/views/fieldeditors/pickers.users.controller.js',
    '~/App_Plugins/UIOMatic/backoffice/views/fieldeditors/checkboxlist.controller.js',
    '~/App_Plugins/UIOMatic/backoffice/views/fieldeditors/radiobuttonlist.controller.js',
    '~/App_Plugins/UIOMatic/backoffice/views/fieldeditors/label.controller.js',
    '~/App_Plugins/UIOMatic/backoffice/views/fieldeditors/list.controller.js',
    '~/App_Plugins/UIOMatic/backoffice/views/fieldeditors/rte.controller.js',
    '~/App_Plugins/UIOMatic/backoffice/views/fieldeditors/map.controller.js',

    '~/App_Plugins/UIOMatic/backoffice/views/fieldfilters/dropdown.controller.js',

    '~/App_Plugins/UIOMatic/backoffice/views/propertyeditors/dropdown.controller.js',
    '~/App_Plugins/UIOMatic/backoffice/views/propertyeditors/multipicker.controller.js',
    '~/App_Plugins/UIOMatic/backoffice/views/propertyeditors/pickers.type.controller.js',
    '~/App_Plugins/UIOMatic/backoffice/views/propertyeditors/pickers.property.controller.js',
    '~/App_Plugins/UIOMatic/backoffice/views/propertyeditors/pickers.column.controller.js',
    '~/App_Plugins/UIOMatic/backoffice/views/propertyeditors/objectsearcher.controller.js',

    '~/App_Plugins/UIOMatic/backoffice/views/dashboards/summarydashboard.controller.js',        
],
css: [
    '~/App_Plugins/UIOMatic/backoffice/assets/css/uiomatic.css'
]

}

So the css bit is important, do you have that in the package manifest?

Hmm, yeah I have this line in my package.manifest:

css: [
    '~/App_Plugins/UIOMatic/backoffice/assets/css/uiomatic.css'
]

But if I do Inspect Element in Chrome I do not see any of that CSS appended to the blocks.

Maybe check the contents then https://github.com/TimGeyssens/UIOMatic/blob/v2/src/UIOMatic/Web/UI/App_Plugins/UIOMatic/backoffice/assets/css/uiomatic.css

Hmm, strange enough, when I change in my package.manifest the old line to this line:

css: [
    '~/App_Plugins/UIOMatic/backoffice/assets/css/uiomatic1.css'
]

and rename my uiomatic.css to uiomatic1.css it works? Maybe it had to do something with the cache?

Yeah could be :) did you upgrade perhaps?

Yeah css and js is heavily cached so must be that you where still serving old versions of the file, glad it's fixed :)

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