i have stuck in this scene and cant give any serum to dakota and mom, what should i go now guys?
Just cum inside of her and move on, you have 9,000 days of birth control.
Also, what level of serums are you able to make? If you can make MCS-X serums, you have probably gone through all of the dose scenes.
There is one buggy thing with Dakota's route, on one or two of the routes you have to encounter particular scenes with her before you can start dosing her again.
If you are stuck at repeating that same scene, you might have a corrupt save. Reload from an older save or try loading the auto save and skipping that morning kitchen scene.
The only other things I can suggest is that you reboot, then clear the browser cache for Chrome and try again. You might want to save to a file before clearing the cache, Twine save files are located in the cache (or stored as cookies) and you could end up wiping your save files.