PSBTis too big problems in BTC transfer

[maurichi77]

I have made a transfer through the platform, this message never appears and I cannot transfer my BTC from my COLDCARD, please help

[SomberNight]

I guess this line might be raising:

electrum/electrum/plugins/coldcard/coldcard.py

Line 231 in af6467b

assert 20 <= len(raw_psbt) < MAX_TXN_LEN, 'PSBT is too big'

If you preview the transaction in Electrum before trying to sign it, what does it say for "Size", how many (v)bytes is it?
How many inputs and outputs does the tx have?

[maurichi77]

I have done this several times but I don't understand what happens.