Thank you for your patience! Skuid has fixed the issue regarding Modulo operator not being listed as an operator in UI-Only formula fields (issue CORE-1934) in the new 12.1.9 release which is now available on the Skuid Releases page.
As a reminder, Salesforce does NOT allow reverting back to prior versions of managed packages. Skuid always recommends installing new versions in a non-business critical sandbox environment to test all mission critical functionality before installing into a production environment. We also recommend that you update out of date themes when you upgrade. Please let us know if you continue to encounter any problems with this issue after upgrading.
Thanks again for alerting us of these issues!
