NoClassDefFoundError while using any Maven dependency

I am using Railway for java + Maven, and every time I attempt to use any maven dependencies, the program just throws a NoClassDefFoundError. Whilst compiling and in the code editor, no errors are shown, and it works locally. But when uploaded to Railway, the build logs will show that they downloaded it from Maven successfully, but they won't function properly; throwing a NoClassDefFoundError any time they are used.