Error: Cannot redeclare class OAuthSignatureMethod

Ensuring the twitter class is not redeclared per the post resolution you mentioned would have been our proposition (will be in next release).

Other than that, see if you have another plugin also calling the class?

No, there is no other twitter plugin.

I have similar problem. cannot even log into my wordpress admin – Fatal error: Cannot redeclare class OAuthSignatureMethod_HMAC_SHA1 in D:\Hosting\12133333\html\wp-content\themes\idstore\code\twitteroauth\OAuth.php on line 120

That looks like your theme is calling the same class.

Check solution applied here https://www.ads-software.com/support/topic/error-cannot-redeclare-class-twitteroauth

This will be default in next release.

HTH

Fixed in 3.0, please let us know if still facing nay issues

It works now, thanks a lot!