Hi Jeremy,
Yes, this could be a cause of the problem, depending which version of chrome you're using and how it's configured. We addressed the chrome samesite cookies issue a while back, but it looks like you're running 3.9 so that shouldn't be a problem. You'll want to consider upgrading that 3.5 site though, since that is now out of support.
That said, I've had reports from a few sources of tool launch issues from versions of Moodle which should have received that patch, so there may be more to it. If you find yourself in that situation, please check out the response headers in the browser dev tools and post back here if you find any 'Set-Cookie' headers there. That seems to be the symptom to a potential problem that I've yet to track down.
Thanks
Jake
Yes, this could be a cause of the problem, depending which version of chrome you're using and how it's configured. We addressed the chrome samesite cookies issue a while back, but it looks like you're running 3.9 so that shouldn't be a problem. You'll want to consider upgrading that 3.5 site though, since that is now out of support.
That said, I've had reports from a few sources of tool launch issues from versions of Moodle which should have received that patch, so there may be more to it. If you find yourself in that situation, please check out the response headers in the browser dev tools and post back here if you find any 'Set-Cookie' headers there. That seems to be the symptom to a potential problem that I've yet to track down.
Thanks
Jake