Thanks for reporting this one, it’s quite puzzling. The only reference I’ve found in the code to tvrsprintf.min.js.map is commented out. But I’ve prepared a version that has that file in the expected place. You can download it here: themeover.com/microthemer.zip
Please could you let me know if that solves the fatal errors? I will then make it available for auto-upgrading.
Just deactivated v3.7.6, deleted plugin and installed the patch zip.
Looking good, the error has gone. Give me a few more runs at it before you clap your hands.
The error seemed to multiply the more “draft saves” I did for a post I was writing.
Will post again in few hours with final comments. I still have the post under construction which means ideal environment for error replication (if it is still present).