Cannot read property 'M' of null

I need help understanding this error. I am trying to launch my Shiny app on the shinyapp.io server. My app seems to run fine with no errors when run locally on my machine, but it fails to start on the Shiny server. Has anyone else run into this problem before?

05 Dec 2021 05:31:36 [rsession-User] ERROR CLIENT EXCEPTION (rsession-User): (TypeError) : Cannot read property 'M' of null;
org/rstudio/studio/client/workbench/views/source/editors/text/AceEditor.java#4487::setScrollSpeed
org/rstudio/studio/client/workbench/views/source/editors/text/AceEditorMonitor.java#46::monitor
org/rstudio/studio/client/workbench/views/source/editors/text/AceEditorMonitor.java#70::execute
com/google/gwt/core/client/impl/SchedulerImpl.java#140::execute
com/google/gwt/core/client/impl/Impl.java#306::apply
com/google/gwt/core/client/impl/Impl.java#345::entry0
rstudio-0.js#-1::eval
com/google/gwt/cell/client/AbstractEditableCell.java#41::viewDataMap
Client-ID: 33e600bb-c1b1-46bf-b562-ab5cba070b0e
User-Agent: Mozilla/5.0 (Windows NT 10.0 Win64 x64) AppleWebKit/537.36 (KHTML, like Gecko) QtWebEngine/5.12.8 Chrome/69.0.3497.128 Safari/537.36

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