I'm not an expert on Web Data Connectors but I know we have a Community Portal on WDCs that might be useful, have you come across this before?
Disclaimer: these connectors are not written by or supported by Tableau. If you encounter an issue with one of the connectors here, please reach out to the developer.
Do you see the same error when trying a few different browsers?
I am using the built in browser of Tableau - I do not think you can use another one, please correct me if I am wrong.
I am actually using the Spotify Connector from your screenshot by Madeleine Corneli.
Hi Roger, my apologies I'm not clear on what you mean by 'the built in browser of Tableau'?? Is it Tableau Online 2018.1?
When you try to log on to Spotify then do you see the same error on different browsers? (Firefox, Edge, Chrome)
I noticed a few threads about this kind of problem within the Spotify community
I do not have the same issue while using another browser. Spotify asks for a Captcha only when using the built-in Tableau browser.