permlink.size() > STEEMIT_MIN_PERMLINK_LENGTH && permlink.size() < STEEMIT_MAX_PERMLINK_LENGTH:
If you have experienced the above error while posting, you are not alone. This has already been reported as far as I am aware and I am sure steemit will resolve the issue soon.
After attempting to figure out the issue for a good while, I realised that it was a problem with my tags. I had placed the tag 'review' on a book post and for some reason I received this error for it.
So just a heads up! If you receive this error, trying removing tags 1 by 1 and see if this resolves the issue!
If not, try cleaning your cache files etc from your browser and then restarting it
I had posting problems too. Here is what worked for me: https://steemit.com/steemit/@hammeringtruth/can-t-post-on-steemit-won-t-post-my-fix