Power query in excel freezee

Looking for help in power query in excel.

when I click "Data">"From table/range",it needs much time to load sometimes will crash.

The perfomance is very slow in our company's laptop even our laptop's RAM is 16G, but I do the same power query on my personal computer, it's fast.

I found the power query will be faster when disconnect the vpn on company's computer, it's weird.