OK, so I deleted the icon previously created, cleared out the JSON in the database, loaded the new 1.23 and repeated the icon load and no more JSON syntax error .
Will this also fix the white screen? I am going to load it now on the Joomla 3.8.5 version and test.
Great and thanks for all the work Michael. I will keep on trying to figure out why the admin white screen still comes up on higher versions of Joomla. I am sure it is something small. May even be another plugin on my system clashing with yours. Will let you know if I find anything. Once again thanks for your support