How to access files from Time Machine after clean installing Sonoma from Sequoia

I made a Time Machine backup of my MacBook Pro running Sequoia 15.2, because that caused problems.

I then erased the disk and did a clean install of Sonoma 14.7.2.

Time Machine did not let me access my data. The folders have a red minus sign. If I try to open a folder it says that I have no permission to see it's content.

If I go to Get Info-> Sharing & Permissions it says I have no access.

What it does show is that it is "..... Fetching" the name that has read & write privilege.

How do I get to my data?