If I try to add an avatar to my profile I get this error on Firefox:
SyntaxError: JSON.parse: unexpected character at line 1 column 1 of the JSON data
And I get this error on chromium based browsers:
SyntaxError: Unexpected token 'R', "Request er"... is not valid JSON
I’m getting the same issue. Lemmy is pretty new and still under active development, so expect some bugs to occur.