Error with pdf-printing: invalid font // pdf Export: missing font styles (from Powerpoint)

[Lisa3000]

Hi everyone,
I'm not sure, if this happened before and I only noticed now, or if this is due to an update:

I use different fonts in Powerpoint, one of them is a google font, installed as ttf. I've never had any problems with that. For sending out a powerpoint-deck out, I use the "export pdf" funktion in Powerpoint. 
Now I noticed, that the styles of this font are not adopted (see image).
Every text in bold/italic/light/etc. looks like the regular style in the pdf. Other fonts are fine.

I tried out printing the file using the "Adobe pdf"-Printer, and here it doesnt even work - no pdf, but an error-file saying this:
"

%%[ ProductName: Distiller ]%%
Inter-Regular not found, using Courier.
%%[ Error: invalidfont; OffendingCommand: xshow ]%%

Stack:
[312 277 293 451 315 121 0]
(
)

%%[ Flushing: rest of job (to end-of-file) will be ignored ]%%
%%[ Warning: PostScript error. No PDF file produced. ] %%
"

I did try out different settings, as "fonts embadding" and "save as bitmap" etc... no change.. I did reinstall the font, all updates i could find I updated.. 

Any help/idea? Or is this a bug? 

[Lisa3000]

okay, apparently adding the file didnt work, so here it is: