The Sine Wave Actorbot site at http://www.sinewaverobots.com is down and has been down for several days. This means that all Pandorabot Actorbot Add-Ons are unable to login to Second Life. I do not know when or if the Sine Wave Actorbot site will be restored.
All owners of the Pandorabot Actorbot Add-On can exchange their purchased product for a free Pandorabot METAbolt Add-On by IM'ing Missy Restless inworld or emailing firstname.lastname@example.org and requesting an exchange. The METAbolt Add-On can do almost everything the Actorbot Add-On can do, is lighter weight, frequently updated, and well supported. In fact, even when Sine Wave is up I recommend METAbolt over Actorbot for all uses except those requiring your bot to sit on another prim and return (e.g. sex bot).
Actorbot users who do not own the Pandorabot Actorbot Add-On may wish to switch to METAbolt. The Pandorabot METAbolt Add-On can be purchased on the Second Life Marketplace at https://marketplace.secondlife.com/p/Pandorabot-METAbolt-Add-On/1793057 for L$395