It looks as though the hacked font has replaced the digits 0,1,2,…,9 with Meitei digits. This means that the digits 0,1,2,…,9 are not in the font and therefore cannot be displayed. (In addition, other characters that Paratext needs, such as \ and v, are not in the font because their location has been taken by a Meitei character.)
As Bobby pointed out, the best way to proceed is (a) to convert your data to Unicode and (b) to use a Unicode font that supports the Meitei script as well as the Latin script characters needed by Paratext.