File not opening again

@rodolforg @BobSynfig help I can´t open my file , getting the attached error message. The problem occured for the first time - after I accidently sorted my layers (and I don´t know if there is a relation), resorted it, closed the document and now its unpossible to open it again why is this is happed every time my file not opening and pls resolve this issue in new version
character head.sifz (118.5 KB)

@BobSynfig hhelp pls what if i use the devlopment version of synig this thing happens ?