Hello There,
X 4.5.1 is now available in automatic updates! This release contains hotfix for issues with Renew Portfolio not loading, so be sure to check out the changelog. Please do update to the latest version. After doing the updates, always remember to clear all caches when updating so that the code from the latest release is always in use. This will help you to avoid any potential errors.
Please let us know if this works out for you.