I have a similar problem. I cannot recover wallet in Electrum, using 24 seeds from Trezor.

I followed the procedure as described in the below link, which says it helps recover wallet only with seeds. 

https://www.buybitcoinworldwide.com/kb/restore-trezor-seed-electrum/

However, the following error arose when open the recovered wallet in Electrum.

"The file '/Users/david/.electrum/wallets/test1' contains an incompletely created wallet.
Do you want to complete its creation now?"

When click 'Yes', then another error arose as below.

Trezor device not detected.
Continuing in watching-only mode.

Reason:
Could not connect to your Trezor. Please verify the cable is connected and that no other app is using it.

So, it seems to need the Trezor hardware to recover a Trezor wallet.