Hello Monica,
Thanks for that.
The creator, Bill Chadwick, added this remark in 2021.
Google have recently ended free use of their mapping services by medium volume websites. For now, WTP is running on limited daily quotas so may fail on you from time to time. As of July 2019 the OSM Landscape and Cycle maps have had to be removed for cost reasons -sorry.l am actively looking for ways to keep the site running.Since August 2021 OS have moved from a daily to monthly map quota. If the site does not work near the month end, talk to them. Thanks for all the support over the years. Bill Chadwick Aug 2021
Just in case anyone does fall foul of the limited quotas, can I suggest the side-by-side map at NLS?
For example : Fort William
https://maps.nls.uk/geo/explore/side-by-side/#zoom=12.3&lat=56.82805&lon=-5.11848&layers=11&right=ESRIWorld