Stuck on Employment Verification with no indication of issue or how to fix

In the Legal info section we have entered the company details and the process is stuck at Employment Verification.  Under rejected there is a clickable "Things to take care" which I assume displays the issues we need to resolve but which on clicking just makes the page jump a bit. I can see a failed JSON Parse message in the Browser Dev Console. The failed JSON Parse message reads as follows:

SyntaxError: Unexpected token '<', "<!DOCTYPE "... is not valid JSON
at JSON.parse (<anonymous>)
at XMLHttpRequest.Jo (https://pcaccountexperiencecdn.azureedge.net/staticres/ng/1.0.23306.4/main.js:1:245579)
at v.invokeTask (https://pcaccountexperiencecdn.azureedge.net/staticres/ng/1.0.23306.4/polyfills.js:1:7219)
at Object.onInvokeTask (https://pcaccountexperiencecdn.azureedge.net/staticres/ng/1.0.23306.4/main.js:1:353662)
at v.invokeTask (https://pcaccountexperiencecdn.azureedge.net/staticres/ng/1.0.23306.4/polyfills.js:1:7140)
at M.runTask (https://pcaccountexperiencecdn.azureedge.net/staticres/ng/1.0.23306.4/polyfills.js:1:2584)
at p.invokeTask [as invoke] (https://pcaccountexperiencecdn.azureedge.net/staticres/ng/1.0.23306.4/polyfills.js:1:8270)
at Z (https://pcaccountexperiencecdn.azureedge.net/staticres/ng/1.0.23306.4/polyfills.js:1:20806)
at N (https://pcaccountexperiencecdn.azureedge.net/staticres/ng/1.0.23306.4/polyfills.js:1:21201)
at XMLHttpRequest.B (https://pcaccountexperiencecdn.azureedge.net/staticres/ng/1.0.23306.4/polyfills.js:1:21365)