I need help with creating app for sending messages with google sheets

error saying: " The operation Elements cannot accept the arguments: ,["<!doctype"] ". The problem occurs when I click the Fetch button, which is supposed to fetch posts from google sheets. For some reason i'm also can't use PC emulator. I've already looked at other posts on the forum, but they didn't answer my question or I just didn't understand something.

Display the response content in a label to find out, what you get... it is most probably an error message and not the result you are expecting


Perhaps because this method REGUIRES a cell phone with an active account.

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