Glossaries printglossary suddenly not working (0 entries accepted, 3 rejected)

I’m trying to use the glossaries package to make a list of abbreviations used in glossed linguistics examples (for which I use the package gb4e). Basically, the problem I’m getting is that my glossary will print for awhile, but eventually it will stop printing, usually after I add a newglossaryentry and reference it in the document, or after I shift the structure of the document around a bit (e.g. moving sections around). Any idea what the issue could be?

Here is the error I get upon executing the glossary_run engine in TexShop (note 0 entries accepted, 3 rejected after scanning /Thesis.glo):

Input index file ./Thesis.acn not found.
Usage: makeindex [-ilqrcgLT] [-s sty] [-o ind] [-t log] [-p num] [idx0 idx1 ...]
This is makeindex, version 2.15 [TeX Live 2016] (kpathsea + Thai support).
Scanning style file ./Thesis.ist.............................done (29 attributes redefined, 0 ignored).
Scanning input file ./Thesis.glo...done (0 entries accepted, 3 rejected).
Nothing written in ./Thesis.gls.
Transcript written in ./Thesis.glg.

Whenever it works, I will get (3 entries accepted, 0 rejected) rather than (0 entries accepted, 3 rejected), but I can’t figure out why they suddenly become rejected. Interestingly, once the entries start to be rejected, they will continue to be rejected even if I undo whatever appeared to be the offending move (i.e. they are still rejected even after I remove the last reference or shift the structure of the document back to how it was before).

I’ve been playing around with it for the past few days, and I noticed that the last time it stopped working was after I added a newglossaryentry and referenced it within a gb4e example in a section that was added to the main document via the command include.

A few more things which may be of importance:

1. I am always using small caps for the name of my glossary entries; for instance:

newglossaryentry{obl}{name=textsc{obl}, description={oblique case}}

2. I only use the command gls{} to reference glossary entries, and the name always appears as it should in the text after compiling (the issue is only with printing the glossary).

3. I started out by using the leipzig package, which was created expressly for the purpose of managing a list of glossing abbreviations. When I couldn’t get this work, I switched to the glossaries package. I understand that leipzig automatically loads glossaries upon being called, so I am thinking that the problem can be reduced to something in my use of glossaries.

4. A MWE which shows the structure of my master file and my glossary entries (note that I’ve pasted the content of the Introduction here, where it would normally be a file added via include; note also that this MWE compiles with the glossary printed for me, but the glossary is not printed when I include the remaining sections):

documentclass[a4paper]{book} 
usepackage{arabtex}
usepackage[X2,LFE, LAE,T1]{fontenc}
usepackage[utf8]{inputenc}
usepackage[russian,arabic,english]{babel}



%%% Packages & Page Settings %%%
%input{PackagesAndPageSettings}
%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%


%%% Commands %%%
%input{Macros}
%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%


%%%Glossary%%%
    
 usepackage[block, nopostdot, smallcaps, nonumberlist]{glossaries}

newglossarystyle{mystyle}{%
  setglossarystyle{long}%
  renewenvironment{theglossary}%
     {begin{longtable}{p{3cm}p{glsdescwidth}}}%
     {end{longtable}}%
}

newglossaryentry{selfobl}{name=textsc{self.obl}, description={oblique reflexive pronoun}}
newglossaryentry{selfemph}{name=textsc{self.emph}, description={emphatic anaphor}}
newglossaryentry{obl}{name=textsc{obl}, description={oblique case}}


setlengthLTleft{0pt}
setlengthLTright{0pt}
setlengthglsdescwidth{0.8hsize}

    makeglossaries



%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%


begin{document}

%include{Content/frontmatter}

chapter{Introduction}
section{Research background and impetus}

I want to talk about the gls{obl} case and how it is related to the gls{selfemph} and gls{selfobl} anaphors.

printglossary[style=mystyle, title=Glossing abbreviations]

%include{Content/phonology}

%...

%include{Content/references}

end{document}

Finally, I’m wondering if the problem could have anything to do with:

(i) the other packages I’m using or the order in which they are loaded (though note that I always have hyperref before glossaries)

(ii) the glossaries_run engine which I made executable the other day

(iii) my version of Perl (v5.18.4)

Thanks very much for your help!