I just updated my Calibre to 6.23 (I think previously I was on 6.19 or 6.20).
Since the update, when adding new books from an .acsm file I cant obtain the corresponding epub anymore.
In particular, the book is only added in acsm format.
When I try to explicitly format to .epub I get the message
Code:
calibre, version 6.23.0
WARNING: Could not convert some books: Could not convert the book because no supported source format was found
StrangerstoOurselves 9780374600853 8328676 - No supported formats (Available formats: acsm)
Just before I updated to 6.23 (i.e. yesterday evening) this still worked perfectly fine.
Any thoughts, ideas, hints that could be causing this? Glad for every help!
PS: Notably, when adding or converting .azw3 files things work still fine.