After Upgrade IOS App on 7-Sep-2018, SONGBOOK Not work ANYMORE? Help.

Sep 6, 2018

what i'am using ipad air,
before update, everything works FINE.

after upgrade,   all MSCZ files locate in synology NAS,
when "send copy" mscz  to IOS Musescore Songbook, 
all failed.   

Pls. help to fix or at least let us use previous version of Musescore IOS.

thanks in advance.