Multiple Image Upload Not Working

[brentpeacher]

I logged into my site this morning to find the following Javascript error when attempting to use the 'multiple upload' feature for images. Any help would be greatly appreciated.

jquery-migrate.min.js?ba4884ae22281f09c11f9f67646bb715:2 JQMIGRATE: Migrate is installed, version 1.4.1
index.php?option=com_phocagallery&view=phocagallerym&layout=edit:136 Uncaught TypeError: Cannot read property 'id' of undefined
at g.Uploader.<anonymous> (index.php?option=com_phocagallery&view=phocagallerym&layout=edit:136)
at g.Uploader.trigger (plupload.js:2)
at v (plupload.js:2)
at plupload.js:2
at Object.init (plupload.flash.js:1)
at v (plupload.js:2)
at g.Uploader.init (plupload.js:2)
at HTMLDivElement.<anonymous> (jquery.plupload.queue.js:273)
at Function.each (jquery.min.js?ba4884ae22281f09c11f9f67646bb715:2)
at a.fn.init.each (jquery.min.js?ba4884ae22281f09c11f9f67646bb715:2)

We're running Phoca Gallery 4.3.18 on Joomla 3.9.10

[KarEm]

Hi,
did you enable "Thumbnails Generating" in Phoca Gallery Options?
Backend --> Components --> Phoca Gallery --> Options --> Thumbnails --> Thumbnail Generation Settings
--> Enable Thumbnails Generation=Yes

Regards
KarEm

[KarEm]

Hi,
I took a closer look to this message. Are you sure it's an error or just a warning?
Does the multiple upload works or is it aborted?

Regards
KarEm

[christine]

Hi,

in addition to colleague KarEm: Check under Options: Users > Upload Settings
> Enable Multiple Upload and:
> Multiple Upload Method > HTML5 Uploader (not flash Uploader)

Kind regards
Christine

[brentpeacher]

The HTML5 Uploader seems to have done the trick. Thank you!

[christine]

Thanks for your feedback.
FYI: current Joomla version is: 3.9.12

Kind regards
Christine