Yeah, I had a trailing space after my API key but that didn’t solve the problem.
I am running WP 8.5 and TT 2.0. Until a couple weeks ago, everything worked fine. Then, no links on twitter, not long-form and not bit.ly shortened.
Figured it was a twitter issue.
Today I tried it again to see if I could get it to work. Deleted and reinstalled plug-in. No luck.
Then, I deactivated the bit.ly twitter tools plug-in. Voila, suddenly my blog posts were being shortened and were showing up on twitter, automatically.
Makes no sense? Yeah.
Am I happy, nonetheless? Yeah.
So, my tip to you is, deactivate or delete twitter tools, re-install, reactivate, then enter your bit.ly ID and API key, again.
Then, try to post.
If it doesn’t create a shortened address, deactivate the three twitter tools plug-ins, one at a time – bit.ly urls creation, #hashtag creation, and exclude category, starting by deactivating bit.ly urls. If that doesn’t work, deactivate all three.
Trial and error will get you what you want!