I’m having the same problem (with a twist).
Indexing used to bring up a blank page, but since I last updated, I now get a statement telling me Indexing Complete, even though the page has
Documents in the index:
Highest post ID indexed:
Nothing seems to get indexed.
The Dashboard still says that I need to build my index.
I played around with the options, to see if I could do anything allowing the plugin to go through and index but nothing I tried helped in any way.
FYI, it’s on https://www.actinbiotech.com/