Quote from: minton980 on March 05, 2025, 10:03:07 AM

So how can I access the missing bitcoin? Than you in advance.

You can manually derive it using HCP's fork of IanColeman's BIP39 tool that supports Electrum seed, use an "Air-Gap" PC if you wish to do it safely.
Link: https://github.com/HardCorePawn/electrumBIP39
Download it with: "Code->Download Zip", then extract and open "electrum-standalone.html" with your browser.

In the tool:

Paste your Electrum seed in "BIP39 Mnemonic" field.
Scroll-down and select "BIP32" tab.
In the "BIP32 Derivation Path";
keep the default m/0 if your address is legacy;
but if it's native SegWit, edit it to: m/0'/0
Now to the important part: Scroll-down till you see "Show" 20 "More Rows", "starting from index";
Edit "20" to "1000" and fill-in starting from index to something like "49995", then click "more rows".
After that, it will show your addresses at index 49995 to 50995

Then you can either check those addresses' balance using a blockexplorer or import those to Electrum via "Import bitcoin addresses or private keys" new wallet option.
For the latter, don't import more than 1000 addresses/prvKeys per wallet.