@rajvib36266313
This issue maybe happening because google decided to change the default setting for the samesite attribute in cookies. you can find more info here: https://www.chromium.org/updates/same-site
As stated in the above link, the rollout is almost complete and thus VEC issues are expected.
Here is the recommendation to be able to create activities in Target :
1. Go to Go to URL : chrome://flags/#same-site-by-default-cookies in your chrome browser.
2. Disable the "SameSite by default cookies" flag
3. Relaunch the browser
Let me know if this helps?
Regards,
Karan Dhawan