Illustrator won't create pdf

This is how I'm saving it but I've tried all the options I can.

Your question looks like it is being asked by two people. To clarify though a third party plug-in would be anything that is added to your Illustrator plug-in folder that has not been manufactured by Adobe. It is possible that even a third party plug-in that worked in an earlier version of Illustrator needs to be updated to work correctly now and could be causing this problem. Is this happening to just one file or all files? Are all of the type fonts being used ones that you've been able to rely on and are working correctly in other files?

You could also try resetting your Illustrator preference file to set the program back to default if this is happening for all files.

To do so:

The User Library folder in which Illustrator’s preferences are stored is hidden by default on most Macintoshes. To access it make sure that Illustrator is closed and click on the desktop to launch a Finder Window (Command-N).With this window in column view follow the path User>Home folder (it’s the folder with an icon that looks like a house—it may have the user’s name rather than “Home”) and click on the Home folder. With the Option Key pressed choose Library from the Finder Go Menu. “Library” will now appear within the Home folder. Within the Library folder find the folder called Preferences and within it find the folder called “Adobe Illustrator <Version #> Settings” (earlier versions of Illustrator might just say “Adobe Illustrator”) and the file called “com.adobe.Illustrator.plist” and delete both that folder and that file. When Illustrator is next launched it will create new preference files and the program will be restored to its defaults.

The advantage of manually deleting preference files in this manner is that after you’ve reset up the program (make sure that no document window is open) to your liking, you can create copies of your personalized “mint” preference files (make sure that you quit the program before copying them—that finalizes your customization) and use them in the future to replace any corrupt versions you may need to delete.

So you are saving a file as an AI/PDF compatible.

Where do you save it? What's in the file? How large is the file?

Do you transfer the file via e-mail?

Then you place that AI file in InDesign? Or open with Affinity Designer?

Does this happen with any file? Or just new ones? Or just old ones?

hi please send me link of your file so i can see what is possible...thanks