Pearler Integration

Recently opened an account with Sharesight - but struggling to integrate this with my broker Pearler. I have an active account with Pearler with data to import. Followed the instructions to connect Sharesight with Pearler in the app which were straightforward - but every time I try, I repeatedly get the same error message under the Sharesight logo - ‘An error has occurred
The requested redirect uri is malformed or doesn’t match client redirect URI.’

Any idea what could be causing this?

Thanks.