csarva
Level 1
I'm having a similar issue with ProSeries 2018. In fact, I cannot even log in via the web in IE 11. I see the following in the console as I click "sign in":

DOM7011: The code on this page disabled back and forward caching. For more information, see: http://go.microsoft.com/fwlink/?LinkID=291337
signin.html
HTML1300: Navigation occurred.
signin.html
HTML1513: Extra "<html>" tag found. Only one "<html>" tag should exist per document.
signin.html (33,32)
ius_page_load_start_time=Tue Jun 18 2019 17:20:52 GMT-0400 (Eastern Daylight Time) ius_js_download_start_time=Tue Jun 18 2019 17:20:52 GMT-0400 (Eastern Daylight Time) ius_renderer_end_time=Tue Jun 18 2019 17:20:53 GMT-0400 (Eastern Daylight Time) ius_widget_render_end_time=1248 ius_js_download_to_render_time=465 ius_nav_start_to_render_time=1751 ius_all_cookies_size=296
generic-log-batch
SCRIPT5007: Unable to get property 'uuid' of undefined or null reference
ius-core.js (11,5620)
Unable to get property 'uuid' of undefined or null reference
generic-log-batch


Note in particular the last 3 lines. It never even makes the log in request. Everything works fine from a different browser (e.g., Chrome) however that's not an option to sign in from within the software.
0 Cheers