Hi there! I understand your login button for the Canvas Credit Union app on your iPhone SE is greyed out and you can’t click it. Let’s work through some ways to get you logged in.

First, just to clarify:
- Is this happening in the Canvas Credit Union mobile app or when you access Canvas via a web browser like Safari on your iPhone SE?
- Have you already entered your username and password, or is the button greyed out from the start?

Meanwhile, a common cause of greyed-out buttons in iOS apps or web pages is the blocking of pop-ups or certain scripts which can disable buttons.

Here’s a simple set of steps to try on your iPhone SE:

1. If you’re using Safari to log in:
- Open the Settings app on your iPhone.
- Scroll down and tap Safari.
- Look for the "Block Pop-ups" option and toggle it OFF.
- Now, close Safari completely (swipe it up from the app switcher).
- Reopen Safari and try accessing the login page again.

2. If using the app:
- Make sure your app is updated to the latest version from the App Store.
- Try force closing the app and reopening it.
- Restart your iPhone SE to clear temporary glitches.

3. Double-check that all required fields (username, password) are filled in correctly, as sometimes login buttons remain inactive until required info is entered.

If this doesn’t resolve the issue, I can guide you further with some advanced checks or look into whether it's a known issue with the app or iOS version.

Let me know how it goes or if you’ve already tried some of these!