Mailmerge: addresses / tables not created

I used to have mailmerge working for me for years, now it stopped.
I go through the wizard, Address data sources, all like before. It has changed slightly, so that there is no more ‘next’ (greyed out), but still I can ‘Finish’. And then the addressesx appear under ‘Data sources’, but when I click on it, I get the famous red cross telling me it is unavailable.
To me, it is a regression. I’m on 6.0.7.3. I have tried many ways, of course, a fresh document, a restart. It takes me through, the test link passes. But when going to the data sources (table), it seems to not exist. I have changed the default location to my HOME, but there is never any file being created. Though I don’t use it for real mail, I have tried to do some Field Assignment, to no avail.

I actually do need it. What can I do?

Probably your data source got somehow lost. Define it anew with existing Calc or Base file.

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Or the office profile is corrupt. Rename or erase it. Then you have to define each of your data sources again.

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Last advice: Update to LO 6.1.x or 6.2.x version. Godspeed