I upgraded–without deactivating/deleting the plugin–and Soliloquy is now working without any errors.
I still have the copy of 2.7.4.2 I downloaded that gave the error in /assets/js/min/soliloquy-min.js, and compared it to the file currently on www.ads-software.com, which you should get if you do an upgrade through the WP Admin UI now, and found that while the files have the same dates, the sizes vary drastically; the copy of soliloquy-min.js that broke things has a file size of only 6.3 kB, while the file that downloaded when I upgraded today is 29.9 kB.
So it looks like for me, the issue was a corrupted/incomplete file being downloaded from www.ads-software.com when I attempted to upgrade originally, and all is good now.
I recommend re-attempting the upgrade and verifying that the two files listed here have the correct file sizes listed:
- /assets/js/min/admin-min.js (80.5 kB)
- /assets/js/min/soliloquy-min.js (29.9 kB)
That seems to fix the problem for me. I tried it on two other sites that are running Soliloquy Lite and they worked too.