Hi, May I jump in!@startup2019 my Letter of Support is valid for 1 year
I'm surprised that yours is valid for only 6 months. I sense you were expected to immediately apply for WP once it was issued.
The Letter of Support is a very important document for SUV if not the most important.
My advice will be to reach out to the incubator to extend the validity (in that case, they will also need to update the one sent to the Government)
When is the AOR of your PR application?
My Support letter is valid for 6 months too. Actually, it is also said on IRCC website that "Each Letter of Support is valid for a period of six months from the date it was issued. "
https://www.canada.ca/en/immigration-refugees-citizenship/services/application/application-forms-guides/guide-5759-application-permanent-residence-business-immigration-program-start-business-class.html
When exactly was your letter issued? Im thinking maybe it was valid for 1 year before. But im not sure