Thanks for contacting the Community with your concern. Sometimes business needs change so I want to make sure you're able to cancel your QuickBooks Online Solopreneur subscription.
To rule out any browser related issues, I would recommend starting with clearing the cache. The cache collects frequently used data to make loading web pages quicker and easier. If it becomes too full it can potentially cause certain viewing and performance issues. Here's how to complete this process in Chrome for example:
At the top right, click More (vertical ellipses), Delete browsing data.
Choose a time range, like Last hour or All time.
Select the types of information you want to remove.