We've had a report of STL ships getting stuck outside their destination system again. I'll update as soon as possible, but if your STL ships are getting stuck and you just can't wait to continue your save, try this. Make a new mod folder named something different, find my mod's zip file in your steam content directory, extract it to your new mod folder, and then edit that copy of 00_utilities_drives using Notepad++. The STL drive component has a negative ship speed modifier of -0.83, change that to -0.82. Start Stellaris, enable your local mod and disable my mod, then load up your save and see if your ship comes unstuck. If not, try -0.81 and so on until it works, and kindly comment what number worked for you. I'll push an update doing exactly this as soon as possible.