Bitly Access Token is invalid

[mplusb]

I am trying to integrate the plugin with Bitly.com. I generate the token from Bitly.com and paste the token into the Bitly access token field in MashShare settings. After saving, I see the warning message says “Bitly Access Token is invalid or bitly.com endpoint can not be reached.”.

After that, I delete the Cache and log out. Then login to the site and navigate to the MashShare setting and I still see the same warning message.

Next, I go to Bitly.com again and regenerate the token and paste it into the MashShare settings. I still see the same warning message.
https://wordpress.org/support/topic/bitly-access-token-is-invalid/

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tested as well, the same thing occurs