Comment 9 for bug 1641380

If you're in need of an immediate workaround, it's possible to disable this check for individual sites by e.g.:

$ echo '{"CertificateTransparencyEnforcementDisabledForUrls": ["weebly.com"]}' \
| sudo tee /etc/chromium-browser/policies/recommended/workaround_1641380.json

Details: https://www.chromium.org/administrators/policy-list-3#CertificateTransparencyEnforcementDisabledForUrls