Manually created JasperSoft Users are missing required PPM Attributes to successfully load / run reports in Studio.
a) Navigate to Advanced Reporting - Manager - Users page
b) Click on Edit for JasperSoft User and navigate to Attributes tab on top right cornet.
<Please see attached file for image>

c) Click to 'Add new attributes' with default PPM attribute setting names and value.
- Name = ppmUserLanguage and Value = en
- Name = ppmUserUITheme and Value = ca_ppm_tealgrey
d) Login back to JasperSoft Studio Professional to validate reports are not loading up successfully.