Run-time error ‘91’: Object variable or with block variable not set

I’ve recently installed a new font (Bengali) named BanglaWord in my machine and was writing happily using it. But suddenly yesterday when I tried to open a file consisting 18 pages, it started showing error [Run-time error ‘91’: Object variable or with block variable not set] and then [Error in text filter: Unknown format (1-1d01)]. And while I tried to open the file by first opening the word application and from there by selecting the file in my desktop, it is showing [Run-time error ‘5’: Invalid procedure call or argument].


Please help me fix the issue and recover the file. It’s very important to me. I’ve already written the first 18 pages of my first novel.


Thanks in advance.