Problem with sending BTC from Trezor error signification transaction

you bought from an unauthorized reseller and we are investigating the issue.

Thank you, I took it in an authorized store - everything is fine! Most likely fakes are being sold.

-26: non-mandatory-script-verify-flag (Signature must be zero for failed CHECK(MULTI)SIG operation)

same problem . please advice

same solution/reason as described in this whole post, please read previous replies.

i didnt got how to fix.

there is no fix, this “error” means you have a fake device, please read the solution.

why i can login to trezor web then and i can see my btc?

because it does not prevent you from doing so.

As of now we recommend you to export your seed to a third party wallet in order to be able to sign the transaction and move your funds elsewhere immediately (to the wallet derived from the seed that was not generated on this fake device).

So please do not use the device anymore as it may result in an irreversible loss of funds.

got it. could you provide any instruction how to import my seeds ? i never did this

you have to choose a wallet where you want to do that, then contact their support or check their manuals.

any advice for wallets?

any wallet, I suggest doing it soon. Then again to a new seed.