I also have this issue. I've cleared the browser history, cookies, cache, ect., in both Chrome and IE, and have restarted my computer a couple times.
Still receiving "An error occurred while loading the page. Some features may not work." when clicking on the Data tab.
This happens in both Chrome and IE.
From the Data tab, I can export the data into an excel file and see it that way, but would really like to view the table on the Data tab, be able to click each individual row, and download each form report as needed.
Things that ran thru my mind:
Too many rows of data on the xlsForm; I have 1,055 rows. Is there a limit??
pulldata() issue
extra geopoints [set to null, and using pulldata() for x,y]
somewhat complex relevant and/or calculation fields
etc, etc
So I removed all that, and published a very simple survey. Same issue: "An error occurred...."
Analyze tab is populated and seems to work ok.
Any other ideas as to what I can try to resolve not being able to see the Data table?