Grouping SVG frags and modifiers broken?

[Lasering]

ScalaFiddle testing grouping SVG frags and modifiers fails to compile with:

ScalaFiddle.scala:45: error: type mismatch;
 found   : collection.this.Seq[.this.scalatags.JsDom.implicits.Modifier]
    (which expands to)  collection.this.Seq[generic.this.Modifier[raw.this.Element]]
 required: scalatags.this.JsDom.Modifier
    (which expands to)  generic.this.Modifier[raw.this.Element]
        mods
        ^
ScalaFiddle.scala:50: error: type mismatch;
 found   : collection.this.Seq[.this.scalatags.JsDom.implicits.Modifier]
    (which expands to)  collection.this.Seq[generic.this.Modifier[raw.this.Element]]
 required: scalatags.this.JsDom.Modifier
    (which expands to)  generic.this.Modifier[raw.this.Element]
        mods
        ^
ScalaFiddle.scala:55: error: type mismatch;
 found   : collection.this.Seq[.this.scalatags.JsDom.implicits.Frag]
    (which expands to)  collection.this.Seq[generic.this.Frag[raw.this.Element,raw.this.Node]]
 required: scalatags.this.JsDom.Modifier
    (which expands to)  generic.this.Modifier[raw.this.Element]
      frags,
      ^

PS: I also tried in Scastie but got object JsDom is not a member of package scalatags