This suddenly started happening to me today.
I like to use the "speak" option to name a local business, and then click the number to call. Today however, this doesn't seem to be working. The google listing will come up, but when I click on the number, I will get a "web page not available" error...
"The web page at wtai://wp/mc;3345343451 might be temporarily down or it may have moved permanently to a new web address"
I've tried this with multiple numbers, and it keeps happening.