Access issues in both logging in and opening certain sheets

I've been experiencing issues where Smartsheet isn't loading, giving an error: Due to network connectivity or feature updates, Smartsheet is experiencing slow loading times. When smartsheet eventually opens up, I get another error on a specific sheet: Your request has resulted in the following system messages: <blank>. This has been continuing for a week now, and it affects our productivity. Is there anyone who can shed some light on this?

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