I'm rebuilding my site with v1.5.1 and got the same.
Although I tried this yesterday and got the same 'blank' admin page result, I have since reverted to an earlier, working version, downloaded the Super Order 4.0.5 package again and installed with working Edit Orders and TY Package Tracker... same result of blank admin page. I just uploaded your fpdf.php again and admin now seems to be responsive!
Thank you Satu!
Agreed, thanks for posting this... it worked for me.
@twi
You might try the fix quoted above.
@DivaVocals
Thank you very much for a great add-on. Very thorough and well documented. I tried out a much earlier incarnation of it years ago and it was overkill and too difficult to get working for me with other add-ons, but now that I'm upgrading (re-building from scratch [1.3.7 to 1.5.1] and revamping my site I wanted to give it another go.
Kudos to the three amigos for collaborating and coding three worthy add-ons to work together!

:
- Edit Orders [must have for me]
- TY Package Tracker [something I always wanted but never tried]
- Super Orders [more bells and whistles to play with and improve administrative work-flow]
Cheers
GAM
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