The add-on has probably been compiled against a different Vaadin 7 alpha/beta version than the one you are using and some APIs have changed since then (assuming you are using PagedTable 0.6.4 and some Vaadin 7 beta). Solution: get the add-on author to port it to the latest beta or download the source code and compile/port it yourself.
PagedTable (like FilteringTable) might depend on some normally internal APIs that are subject to more changes than the public APIs.
I’ll answer my own question just in case someone has the same issue:
download the 0.6.4 jar
extract the 2 java classes (PagedTable and PagedTableContainer)
PagedTableContainer is missing an implementation:
@Override
public List<?> getItemIds(int startIndex, int numberOfItems) {
return container.getItemIds(startIndex, numberOfItems);
}
either recompile the jar or add the java classes to your project