If you are getting different behavior with the two accounts, there must be a required permission that the local account does not have. You may want to take a look at the "Configuring Permissions" section in http://www.foxweb.com/document/WebServer.htm.
You may also want to look in the error log for more information about the error.
FoxWeb Support Team
Sent by Jeff Grippe on 04/10/2018 07:37:35 PM:
We tried to set up foxweb on two accounts, Account A has domain Admin rights and Account B has Local Machine Admin rights. It is working on Account A, but when we tried to login using using Account B it gives us an error. Error in Fox Web Foundation