Javascript/jQuery error not resolved by disabling theme and plugins

I have seen this error many times and usually I can find the plugin that’s causing the conflict, but this time disabling everything but UpDraft (all at once and one at a time) did not change the fact that the UpDraftPlus page doesn’t load completely, rendering it unusable, though schedules backups that are sent to my client’s Google Drive still take place.

The instructions at the link provided in the error message says to contact you if this happens. Could you please help me troubleshoot this?

• This topic was modified 6 years, 6 months ago by Hannah West Design. Reason: Added fact that scheduled backups are taking place and sending backup files to remote storage

The page I need help with: [log in to see the link]