No Location List Loading

Please help - the map for this site is not loading the locations in the list, regardless of which list or which list type I select.

I updated both the Joomla version and plugin today and everything was functioning correctly. I needed to update the list to add additional locations, and when I uploaded it & replaced the previous file version, the list ceased to load. Again, everything was working until I tried to update the data file, and now no data file will display.

I have tried changing the list source to a sample file to determine if it was a file creation issue on my side, but the demo files won't load either.

I have tried multiple browsers and cleared every cache I can find. Nothing is working. Please help!

Joomla version: 3.6.4
plugin version: 3.6.5
map URL: www.taccagreatersanantonio.org/find-an-ac-contractor

Dear Penguin,

Usually it is an error in your miscellaneous or another field which allows HTML, however I've tried to access your XML file www.taccagreatersanantonio.org...tor/data/tacca-members-geo.xml but it says it doesn't exists.

The sample files are loading correctly:
www.taccagreatersanantonio.org...a/GreatBritain-Attractions.xml
www.taccagreatersanantonio.org...any-CastleFortSchlossRuins.csv

Best regards,

I've reset my location setting to use the sample xml file, but it's still not showing anything on my end.

Dear Penguin,

It seems to be working properly now:
storage5.static.itmages.com/i/...1061799_3323978_e177d6215a.png

Best regards,

Okay - I'm still confused, but it seems to be working again.
My xml data file had improperly coded ampersands which I corrected. The location list then started displaying. However, I had set the list to use GreatBritain-Attractions.xml (and I would have sworn I'd saved my changes).

At any rate, it's working and includes the new records, so I'm not going stress about the rest.

Thank you so much for putting me on the path to fix the data file!