If you do not have your seed phrase or private keys and are having trouble following the step-by-step to restore the wallet.zlw file in YWallet, you can try changing the ZecWallet Lite 1.8.8 server URL from the settings.json file located in the ZecWallet Lite folder.
The first thing to do is to upgrade ZecWallet Lite to version 1.8.8.
Then you should find the ZecWallet Lite folder which is hidden in the following paths:
Mac: <>/Library/Application Support/Zecwallet Lite.
Linux: ~/.config/Zecwallet Lite
Windows: C:\Users\username\AppData\Roaming\Zecwallet Lite
Remember to enable the option to display hidden content.
In the ZecWallet Lite folder you will get the settings.json file, open it and edit the server URL, you can also copy and paste it in case the file is empty:
{"all":{"lwd":{"serveruri":"https://lwd1.zcash-infra.com:9067"}}}
You save the changes and open ZecWallet Lite, the wallet will start synchronizing and you will be able to save the seed phrase, private keys of addresses, etc.
Although by changing the server you will be able to perform transactions, it is not recommended as ZecWallet Lite handles a very low fee and transactions may not be validated.