P: Mobile: Offline export fails despite having “stored locally”

Same error message on iPad when trying to export in "Max available".

Still in "Max Available":

Updates to Lightroom Classic, Camera Raw, and the Lightroom Ecosystem were released yesterday and contain a fix for this issue.  Please install the appropriate update and see if it solves this problem. You can read more about the updates here.

Thank you for your patience. 

Note: I am no longer seeing this issue on my own devices. 

Hi Rikk! New update today (and what an update!!) but bug is not fixed !

Thanks Rikk.....I've also raised a bug report for the misleading "unable to export while offline" message. That seems to be restricted to iPhone only, though it appears for all types of valid export (i.e. not just smart previews, but also originals).

This issue (Largest Available from Proxy) should be fixed in the next release of Lightroom mobile. 

Indeed, Jim:

1. 
   
2. 
   Largest available fails on both my iOS devices, small and custom (even upscaled) work. -->  Bug
   
3. 
   
4. Note that "small" and "custom" used to fail on iPad despite being solved by a reinstall, the presence of a bug is still undeniable*
   
5. 
   
6. No, I don't see "unable to export" but a "rendering" wheel (see image below)
7. 
   
8. Indeed, we've narrowed down to the case where "only" export with max available fails... until the bug reappears
9. 
   

--> Maybe even more importantly, we've come across YET ANOTHER sync bug, on which we have no investigation possibilities, but probably plays an important role in this story. But as it involves Classic, I'm sure this bug will be parked as WontFix.

*I don't won't Adobe to believe reinstalling an app is an acceptable solution or fix, especially when offline work makes this workaround impossible to apply!

Yes, that's what I would expect, based on my own testing. So a quick recap:

1. We're both seeing the same issue with "Largest Available Dimension", so we think that's a bug. I've checked on an Android phone, and "Largest Available Dimension" does work on that device.
2. When doing successful exports while offline, I'm seeing a very brief "Unable to export while offline" message appear. Did you also notice that when testing on your iPhone? If so, we could call that a bug as well (I don't see that message in the Android app), though it's simply a false flag.
3. That still leaves your original issue when trying to export while offline on your iPad. If an app delete/re-install didn't fix it, then I'm out of ideas...maybe it's related to the device type/iOS level? Whatever it is, I think you'll need Adobe to address that with you.

On iPhone :
Max available : still fails
Small (2048): works
Custom 2651 (!) : works
Custom 5000 : works

Tested on a couple of images

OK, if the iPhone is now correct, how about trying to download the smart previews for that album and then trying the offline export again?