The export button is not working. F12 Developer tool > Console tab shows an error related to cfgUseLegacyExport variable.
Release : 17.3 RU 17 and later
The upgrade was not successful. Due to this problem, the NX_ROOT\bopcfg\www\htmpl\default\ahdtop.htmpl file was not updated and does not include the cfgUseLegacyExport variable.
Option 1 (Recommended): Retry the upgrade following the KB article Incomplete or Partial Service Desk RU installation update
Option 2:
2.1 add the following line in line 185:
var cfgUseLegacyExport="$env.NX_USE_LEGACY_EXPORT";
Example:
2.2 Save changes
2.3 Delete cache from the browser (or incognito window)
2.4 Remove cache from server side by running: pdm_webcache -H