A problem occurred when attempting to sync with the blockchain. Try manually run

[freds4408]

Please how do i get my electrum sync with blockchain?
I have and old version of electrum wallet portable version 1.7 running on windows 11 that i had being using since 2013 till date but after changing my internet modem. I started receiving an error when i open my electrum saying
"A problem occurred when attempting to sync with the blockchain. Try manually running resync.cmd"

The worst is that i had misplaced my seeds and master keys i only have just the files backed up on my onedrive. I would be very happy if you can assist me sir.

[hosseinimr93]

The solution is simple. Update electrum to the latest version. Very old versions of electrum cannot sync.

Warning:
Download electrum only from its official website and do not forget to verify your download.

Edit:
Follow the suggestion given by LoyceV below before doing anything else.
I don't know how the version 1.7 works. You can also check if it's possible to export your seed phrase. (Note that if you have imported any private key into your wallet, they are not backed up by your seed phrase.)

[LoyceMobile]

The solution is simple. Update electrum to the latest version.

Before doing this, backup your wallet. If the upgrade fails, it gives you the option to try something else (for instance export the private keys).

[dkbit98]

Please how do i get my electrum sync with blockchain?
I have and old version of electrum wallet portable version 1.7 running on windows 11 that i had being using since 2013 till date but after changing my internet modem.

So you managed to update windows os spyware to v11 but you use electrum wallet from stone age  
Why don't you first update with latest version of Electrum wallet and replacing exe file with one you have on your device?
Using portable version is not recommnded for regular users, and it's better to use other available options or Electrum with Tails OS.

The worst is that i had misplaced my seeds and master keys i only have just the files backed up on my onedrive. I would be very happy if you can assist me sir.

It's very important to never keep any sensitive files on cloud like onedrive aka someone else computer drive!
Misplaced words can potentially be corrected if you have all of them written on paper.