Can't unhide even though I am licensed


Hi there. I'm working for a client who has shared a Smartsheet (they are the owner, they have created the sheet with their own license). I am attempting to work on the same sheet, and even though I have my own 'business' license, I am unable to unhide columns (seems like it's treating me as an unlicensed user). Am I really expected to have multiple licenses to work in different client domains??

Appreciate any guidance on what is happening here and any workarounds!