[ERROR] Failed to get solidity version from server about web3j

[Julius278]

could you provide your whole pom?
Maybe you're missing something

Also, yould you try to use a newer version of web3j core? I just tried 4.10.3 and it worked fine

Besides that I would adjust the java output directory to match a valid package, at least add in the "main" /src/main/java/generated

[Julius278]

@creazyCode
additionally you could enhance your pom by generating the Java wrapper on every mvn build like @fcorneli did it here:
hyperledger/web3j-maven-plugin#14 (comment)

afterwards you can adjust your solidity contracts as you wish and build your application without regenerating the wrapper classes alone

[alok2424]

@creazyCode Try this: Reduce the solidity version from 0.8.20 to 0.8.16