On the Email Merge screen, if you receive a popup error that reads, "Error while executing filter StripScriptsFilter - TypeError: Cannot read property 'replace' of undefined," please review your Chrome extensions to make sure that Grammarly is disabled.

This link provides information on how to manage Chrome extensions

Grammarly extension has a script/code that accesses text fields on a given webpage. It also attempts to modify the page to provide feedback to a user. This code, which is owned and maintained by Grammarly inserts its own HTML and also sometimes works incorrectly causing pages to crash. PCR Educator has no technical capability to access Grammarly code and to fix it and thus the only solution is to disable Grammarly extension or use "incognito" browser feature.

This is a known problem that affects many web applications:
Grammarly Known Errors
PCR Educator K-12 School Information System is an online database engineered for independent and private schools to deliver the highest level of flexibility, unique experience, transparent communication and customized design. Being a complete cloud-based solution, PCR Educator system guarantees convenient access anytime, anywhere.