Sorry to hear that you facing issues with Adobe Stock services.
The file(85921097) is only available in the AI format as mentioned in the Adobe Stock website.
Also, I understand that you do not have an Adobe Illustrator, as an alternative you can download the same image using Photoshop. But since they are vector images there are chances that the files may get pixelated and we can't give a guarantee of the image quality. The vector images are best to be downloaded in Illustrator.
As a workaround, you may download the trial version of Illustrator(7 days trial ) and can try to use the files.
You may use this link to download the trial version of Illustrator:
If you wish to only download JPEG files, please filter down the option in the Adobe Stock website to get the desired option. Below is the screenshot:
Feel free to update this thread in case of any additional questions.