I have recently upgraded to dreamweaver cc 20.2 from a 2015 version. I am unable to get my google sitemap generator working because i can't get logged into dmx zone extension manager. I have a valid account, and i still have the old 2015 version of dreamweaver installed and the dmx zone sitemap generator works in the 2015 version. I know i need to install the updated extension for sitemap generator but when logging into extension manager i continue to get this error

{"name","RequestError","code"."ERESULTSCOUNT","message"."Invalid
results count. Should return exactly 1
record."}

Please help

You had 2 accounts created using the same email - one was created in 2002 and the other one in 2004. I disabled the other account, so you should be able to log in now.