InDesign 2025 is not exporting to PDF.

I have a previously prepared Arabic document. I’ve made the necessary corrections, but when I try to export it to PDF, the application crashes.

I'm guessing that you've received a translated INDD from some kind of language services provider, and you're trying to make a few edits in your English InDesign before exporting a final PDF, right? If that's the case, then the first order of business is to make sure that your English platform & your edits aren't causing the issue. Can you open up the Arabic INDD you were provided and make a PDF of that? If you can't - if you get the same crash that you get from trying to export PDF after making those edits - then you're best off trying to figure out why that file won't export to PDF. My favorite method of testing here is the "divide and conquer" method: if your doc is e.g. 100 pages long, then try exporting a PDF of just the first 50. Does it work? If so, you know the problem is in the last 50 pages. If it crashes, then you know the problem is in the first 50 pages. Try exporting the first 25 pages. If it doesn't crash, then you know that the problem is in pages 26 through 50. Sometimes, a single malformed page, or a single malformed object, can crash the PDF creation process.

Sometimes, though, it's not a single object that is the problem - it's the document itself that is corrupt, not a single page or a single frame or whatever. Two normal troubleshooting techniques are 1) to export IDML and reopen that, resave with a new name, and try to export PDF; or 2) move all of the pages of the document into a new empty file, as Robert suggests. But you can't use #2 if you're using plain-vanilla English InDesign, because  you can't start a right-to-left document with spine right and RTL page ordering.

So if you get stuck here, having already tried IDML export, I'd suggest going back to your LSP and saying "Hey, I can't make a PDF of this INDD that you provided. Can you re-export and redeliver?" Alternately you could try Robert's suggested method of moving pages; it won't leave you with a printable final file, it'll only prove that the problem lies upstream at the LSP. For what it's worth, I'd be happy to make you a new empty RTL file, if moving the pages fixes your corruption, but you can't go back to your LSP for whatever reason. 

If you're confident in your ability to handle editing and finalizing right-to-left documents, you could install your own "Middle East edition" of InDesign. If you go into the Creative Cloud app preferences, in the Apps section, there's a "Default install language" dropdown. Yours is most likely English, right? I honestly don't know if there's a Turkish localization of InDesign. But anyways, in that dropdown there's a choice for "English (Arabic)". If you confirm that choice and go back to your Apps section of the CC app, it will let you install another version of InDesign that has controls for all of the right-to-left features, including making a new InDesign document with proper RTL spreads and controls to choose spine-right or spine-left. 

@Hatice Kübra T

What platform, OS and InDesign versions? 

Are you using EN version or MENA version of InDesign? 

It's also possible, that your INDD file got corrupted - you can: 

- do IDMLing - export as IDML, open, save with a new name - do not overwrite your original file, 

- create a new, blank document with the same page size and margins and then move all pages from the old document to the new one. 

Version of InDesign and your OS? Are you using the ME version?

Any error messages?

There's some very good information about setting text direction in @Joel Cherney 's replies at https://community.adobe.com/t5/indesign-discussions/text-direction/m-p/15265245#M620524