Sorry for the inconvenience - this is a known issue, and we have a fix coming in the 2.6.3 release, which should be out either this week or next! We've now completed internal regression testing, and just need to finish the packaging and release procedures. I'll try to summarize everything for you below:
The "Import digital objects" functionality you've shown in your image, which allows you to upload multiple digital objects as children to an existing description, previously relied on a Flash-based multi-uploader. As you may know, Flash has been deprecated, and all major browsers removed their support of it in December of 2020.
For more information, see the following forum announcement:
We've been working on a fix since then, and had hope to release it sooner - however, some security reports from our community needed to be addressed, so we focused on patching those vulnerabilities as quickly as possible with Release 2.6.2. You can see an update announcement posted in the forum here:
Since then we've been finalizing the work on 2.6.3, which will include an HTML5-based replacement for the multi-uploader. I've just written the documentation for it yesterday, and we'll be pushing that to the AtoM website soon, in advance of the 2.6.3 release.
Along the way, we also tried to address several of the most frustrating bugs and regressions reported by our community - as a result, it's taken a bit longer to prepare, but we have a really solid release on the way. You can see a summary of what's included on the draft release page I prepared yesterday:
- At this time, the multi-uploader will not work in release 2.6.2 and earlier. We apologize for the delay between the Flash deprecation and the availability of our replacement.
- We expect to release AtoM 2.6.3 late this week or early next week. It will include a replacement for the multi-uploader.
Digital object upload options in the meantime
Linking a single digital object to an existing description will still work. Meaning: you can create some lower-level descriptions, and then use the "Link digital object" option in the More menu to attach a single digital object to each description in AtoM 2.6.2 and earlier. See:
Essentially, it might require a few more manual steps, but you can still upload digital objects - you just need to do it one at a time for now.
If you are looking for bulk digital object options, I have outlined a few potential workflows in this thread: