"Hi there, I installed the AppExchange app Skuid and created three components. When I try to drag a Skuid component, it throws an error: 'This page has an error. You might just need to refresh it. [Cannot read properties of undefined (reading 'protocol')

@Ram D -  I work at Skuid,  thanks for asking this question.   You will get better support by raising this issue on the Skuid community (linked above).   But here are a few questions. 

1.  Are you using the most recent version of Skuid?  We have done a lot to better support Lightning in recent releases. 

2.   Do you have LWS for Aura turned on on the Org?    Sometimes turning that OFF  (especially in older versions of Skuid) will correct problems like you are having.   In more recent versions of Skuid we have fully supported LWS for Aura - in case that is a sensitive issue for you.