Multi-Upload Getting: HTTP Error.Undefined

[Tomnibus]

My environment as far as I know is Windows, I'm using a web host.
Joomla 3.7.3 (latest as of today)
Phoca Gallery 4.3.5

I originally had 4.2.8 and I was trying to upload as a user (not through the admin interface) and I was getting "error while saving item" and through Multiple-Upload, I would get "HTTP Error.Undefined"

Now, I updated and now I can upload one image at a time and it will work and generate the thumbnail. However, If I try multiple, it will still fail with the same error.

Before updating from 4.2.8 it would not generate the thumbnails of the images uploaded (they would still upload, they were just somehow corrupted.) Now, at least, with 4.3.5, it will upload, I see the error, then I have to go into the Administration side of things and have it generate the thumbnails. I don't know why.

Oh yeah, if I do a Multi-upload in the admin section directly. I get them uploaded without a problem.

Any ideas on what is going on? Where I can check or have my hosting provider check?

[Jan]

Hi, where exactly do you get the problem, in frontend upload or in administration? What about errorLog on your server ( https://www.phoca.cz/documents/16-jooml ... rs-on-site ). Do you get any detailed error message?

Jan