In this case, look to see if you have a column called xchan_epubkey in your xchan table. It will probably be at the end.
It does exist.
Then do a quick search of the xchan_addr column of the xchan table for your webfinger address (einer@digitalesparadies.de) and see that there's some gibberish starting with z6Mk in the xchan_epubkey field
SELECT * FROM `xchan` WHERE `xchan_addr` = 'einer@digitalesparadies.de'
...shows two enties
in column xchan_network
Column "xchan_epubkey" is empty for both entries
Extra info:
SELECT * FROM `xchan` WHERE `xchan_epubkey` != ''
shows two entries (only) with column xchan_addr is
- mike@macgirvin.com
- pkill9@zotum.net
If not, visit admin/dbsync/1276 and re-run that update.
I visited
https://lau.digitalesparadies.de/admin/dbsync/1276 in the browser (as admin logged in)... no change.
https://digitalesparadies.de/admin/dbsync/ shows Failed Updates 1276 too. ... and the column xchan_epubkey is empty too there.
Does it help if I activate the php error log and look for entries there?