Problem sharing between Windows and Linux Brave Browsers

Hello,

I just installed Tabox hoping to sharing my Brave tabgroups from Windows 11 to my Brave browser on Linux but it doesn't seem to work.

Steps I took:

Export collection from Brave on Windows, which generated a text file.
Open Tabox in my Brave browser on my Linux machine, click on Import Selections, select the text file that I downloaded from my Windows Brave browser
The Tabox dialog window disappears as soon as I complete step 2 and nothing happened. No entry in the collections field in my Brave browser, and no tabs or tabgroups show up in the browser at all.

Both Brave browsers are up to date as well as the Tabox versions.

The text file that's generated appears to contain a jumble of scripts, not simple texts that represent lists of urls (see screenshot)?

Anything I'm doing incorrectly?

Thanks in advance for any suggestions!