Dear rook,
Your suggestion was as effective as irrational:
Why !!@#$#%#! should FocalPointBot be connected to el.wikisource, since my request was to work in el.wiktionary?
Why and how was FocalPointBot disconnected from el.wikisource (if it was ever connected in the first place?)
..... and now the best question....
As I now connected to el.wikisource after your kind suggestion...
WHY !#$%$#@@&!! does it work now by making the edits in el.wiktionary????
In conclusion: Even though I have these slightly frustating questions, I do not care... since FocalPointBot now works. Many many thanks for your help ! Have a nice weekend :)

I want also to report, that I tried to use PAWS with my normal account FocalPoint. It works. It does not work with FocalPointBot.

I logged in again, gave authorization to OAuth.
Same message.
Failed OAuth authentication for wikisource:el: The authorization headers in your request are for a user that does not exist here

Yes, I logged out and in again. I did it just now again. No change.

@fdans thank you, indeed, not exactly the same, but with a bit of processing, I may get something similar to what I was looking for.
The tables of Wikistats 1 seem tedious in comparison with the flashy looks of Wikistats 2, but still there was value there as well.