Hi. I have the same problem as Vasya Terkin. I try to setItems on a Report and get “java.lang.IllegalArgumentException: HTML must contain exactly one top level element (ignoring text nodes). Found 4 elements with the tag names title, meta, style, table’”. Version of Vaadin is 14.1.23.
I do not understand the solution of Tatu Lund because on my side there is no such line only setItems.
How to solve this?
It seems to be a breaking change in Vaadin. Fixed in the latest add-on version.