Having major issues with summer dot fi and pop connect, since yesterday popup is mot being shown when trying to make a connection, tried different, browser , machines and connections, serious issue, looks like the popup coonect servers not responding correctly!
I checked the service you are using (summer.fi) and it is possible to connect MetaMask third-party wallet to it. Do I get it right that you cannot connect your Trezor device to MetaMask? If so, try to connect Trezor to MetaMask again (information on how to do it can be found at Pair and connect your Trezor device with MetaMask and in this video).
After the desired ETH account is connected to the MetaMask, try to connect MetaMask with this account to summer.fi