thans for your advice. Your recommanded command ran without any error with admin privilages ... but still the same error with the missing source file :(. I also tried to use the MiKTeX Console -> Task -> Refresh font map files ... but as well without success :/.
I have following problem, I like to use the gentium package but I only got the error:
miktex-makemf did not succeed for the following reason: The ec-gentiumplus-italic source file could not be found Sorry, but miktex-makepk did not succeed for the following reason: PK font ec ...