There was an update to the paperpile android app in the last week. It has broken the ability to add a reference.
With a .pdf selected in Fx file browser or opened in a Xodo tab, I do “share”, select Paperpile,
it brings up dialog “Add to library (include PDF if available)”,
I click the “Add to Library” button,
it brings up a new dialog saying
“Added reference to your library
something went wrong
cancel/retry”
clicking Retry does not work.